The Multifamily Millionaire Volume I: Review (2026)

Real estate publishing has a gap. There is an enormous amount written about single-family rentals, and an enormous amount about 100-unit apartment syndication. The band in between — the duplex, the fourplex, the twelve-unit building — gets far less attention despite being where most investors who scale actually go.

Volume I is about that band, and filling the gap is its main contribution.

Snapshot	Details
Authors	Brandon Turner and Brian Murray
Publisher	BiggerPockets Publishing
First published	2021
Scope	Small multifamily; Volume II covers large
Best for	Single-family owners deciding whether to move up

Why small multifamily is its own problem

The book is organised around a distinction that matters more than it sounds: the four-unit line.

At four units and below, you are in residential territory. The appraisal uses comparable sales, conventional residential financing is available, and owner-occupied loan programmes with low down payments apply — which is what makes house hacking a fourplex the single best entry point in American real estate for someone with limited capital.

At five units and above, everything changes at once. The valuation switches to income divided by cap rate, the financing becomes commercial with shorter terms and balloon payments, and the lender starts underwriting the property's operations rather than your salary.

Understanding that boundary is the most useful thing a single-family investor can learn about multifamily, and Turner and Murray explain it clearly.

What the authors bring

The pairing is deliberate. Turner came up through small residential and BiggerPockets; Murray built a commercial portfolio from a standing start with his own capital rather than syndication — his own book, Crushing It in Apartments and Commercial Real Estate, covers that path. Between them they cover both sides of the four-unit line from experience.

Murray's presence is what keeps the book from being purely a residential author's speculation about commercial property, which is a common failure mode in this subgenre.

What is practical

• Finding deals in a market with no MLS equivalent. Small multifamily is often traded through brokers and owner relationships rather than public listings, and the sourcing chapters address that directly.
• Underwriting on income. Reading a rent roll and a trailing-twelve operating statement, and identifying where a seller's pro forma is fictional.
• Value-add as arithmetic. Because commercial value is NOI over cap rate, a $100/month rent increase across twelve units creates a calculable amount of value. The book works this through properly.
• Managing the transition. What changes operationally when you go from three scattered houses to one twelve-unit building.

Where 2021 shows, and it matters

This book was published at close to the peak of the cycle, and two things have changed materially since.

Commercial debt is a different instrument now. The financing chapters describe an environment of cheap, available commercial debt. Short terms and balloon payments — which the book correctly identifies as the structural difference from residential lending — became the mechanism by which a lot of 2021 buyers got into trouble when they had to refinance into much higher rates. The risk is described; the consequence was not yet visible. Stress-test with the cap rate, debt yield and exit cap stress test.

Insurance has repriced. In small multifamily the operating margin is thin enough that a doubled premium can eliminate the value-add gain the book is teaching you to create. This is largely absent.

Cap rates were compressed. The value-add arithmetic works in both directions. Deals underwritten in 2021 on the assumption of stable or falling cap rates were exposed when cap rates expanded.

Who should read it

• Investors with two to five single-family rentals wondering whether the next purchase should be a small apartment building.
• Anyone considering house hacking a duplex through fourplex — the residential-side chapters are directly applicable.
• Investors who want to scale without raising outside capital, which is Murray's whole story.

Who should skip it

• If you have not bought anything. Start with ABCs of Buying Rental Property or a first-rental guide.
• If you intend to syndicate. That is Volume II, and Financial Freedom With Real Estate Investing argues the case more directly.
• If your market has no small multifamily. Large parts of the Sunbelt built almost none; the strategy is geographically constrained in a way the book does not stress.

What to read next

• Crushing It in Apartments and Commercial Real Estate — Murray's own account of doing this without partners.
• Single-family vs small multifamily for a first rental — the decision, at the entry level.
• 9 lease-up mistakes in secondary city multifamily — what goes wrong operationally.

Final take

The best single book on the four-to-twenty-unit range, and the four-unit-line framing alone is worth the read for anyone scaling out of single-family. Published at the top of a cycle, so treat every financing assumption as generous: model the refinance, model the insurance, and do not assume the exit cap matches your entry.

This review is part of the best real estate investing books library — 40+ titles ranked by the decision in front of you.