Small multifamily (2–4 units)
Duplexes, triplexes, fourplexes are an attractive step after single-family. They qualify for owner-occupied financing if you live in one unit. They diversify single-tenant risk. They're the building block for the "house hack" strategy.
2–4 unit properties get residential financing (better rates and terms than commercial). 5+ units crosses into commercial — different financing, different evaluation (cap rate based on NOI, not residential comps), different complexity.
For most regional first-time investors, a 2–4 unit property is a better risk profile than a single-family rental: if one unit is vacant, you're not at 100% vacancy. The operational learning curve is similar to one rental but the diversification is real.
Watch for older 2–4 unit buildings with deferred maintenance — most pre-1970 small multifamilies have at least one major capex item lurking (roof, sewer line, electrical). Reserve at 1.5–2% of value annually instead of 1%.