With single family, duplex, fourplex, one vacancy takes you from 100% to 75/50/0% occupancy, and likely your will be cash flow negative, hence why you are still being underwritten with a personal guaranty on the loan.Once you get into larger deals, then your credit and income are less important, as the asset is being underwritten. 

Won't that mean that the expenses now increases because there is a larger loan attached?

You can then go on to occupy another multifamily property, acquiring a conventional loan with a larger down payment.These rules/lending limits might be a bit different in your market, but my point is this : the rules are tricky, you need a long-term plan and a great lender/agent who specialize in investments.

Spent about 7K on the larger unit and only 3K on the lower level. 

We held onto it for a few years a did a like kind exchange (bought up), into a newer, larger, more expensive property.

The money leverage, I was referring to if you used a larger down payment on the 15yr to make it cash flow similar to a 30yr. 

I take my dog on a walk in our neighborhood.

My main goal is to buy/hold small multi-unit properties until I have enough capital to jump into larger multi families.

Hey @Adalberto Jimenez, unless you're looking at deals larger than a 4-plex, it's still considered residential real estate.I'd be happy to share with you my superstar residential broker that helps her clients find great MFH deals.

Let's assume:nothing is brokennothing is amazingall major items are "fine" (it doesn't need a NEW roof, but no major leaks)no poolno car ports or garageno dog parkmixed units 1/1, 2/1 and 700-850 sq'water, gas are billed If you are about to answer this with a: "Well it all depends on the circumstance, no two properties are alike." please move on.