My 2cents - it totally depends on the market in that area. Here in FLorida, in the 2010-2015, I sold almost exclusively SF investor homes (about 200 of them, to investors from Cali, and abroad), and as values rose, and ROI's dropped, I found the natural progression was toward multi, to get worthwhile returns for my clients. So 4 units became the smallest I dealt with for a while, and I'm squarely in multifamily now. Further, because permitting for construction of multifam buildings are non-existent in the $750-$1000 per month range, this is a solid category to buy in, here in FL, because overbuilding won't dilute values or rents.... so the economics of each area are huge in determining which markets to invest in. Of course, we salespeople often recommend what we know best - and I may be no different ;) - but again, smart investors always look at the best options in the nation, and decide where the best place to put our investment dollars are... factoring in the returns, the potential for appreciation, and most importantly, the strength of the team on the ground. I'd love to connect with you Richard, if you'd like to learn about the Florida market.