I'm trying to get a mortgage, but it's entirely possible that the mortgage might not cover 100% of the price of the house.

Just the fact that it's a townhome means there's 1 or 5 or 50 just like it, so I can't picture what could be so unique about it unless the OP is fleecing the seller and he knows it, and the seller has just realized that which is why he doesn't want to sell.

Sorry if this has been covered before, we are located in Minnesota if that matters.   

Now let's say I find a triplex that covers the 1% rule but combined cash flow from all 3 doors is roughly $150-$200 or would you want to keep it at $150-$200 cash flow per door with the 1% rule applying? 

This is the percentage of costs (purchase and rehab) covered by the loan.

@Lauren Merendino I know a lot of my CFO clients like to see a picture vs. just numbers.

Alternatively if they all love the deal, that's also likely a good sign.You can get a dog of a property in a crap neighborhood that will yield a 13.6% gross cap (not saying yours is), but that certainly doesn't tell the whole financial picture of how the asset will perform.

Can try to reposition to Class B, but neighborhood may impede these efforts.Vacancy Est: Historically 10%, but 15-20% should be used to also cover tenant nonpayment, eviction costs & damages.Tenant Pool: majority will have FICO scores of 560-620 (approaching 22% probability of default), many blemishes, but should have no evictions in last 2 years.

Or maybe the units aren't equal and one rents for $2800 covering most of the cost of living there. 

They can also give you a better idea of how much you should be prepared to pay so you can cruise through your closing with confidence.And as you plan ahead for closing day, be sure to budget for your real estate agent’s professional service fee too, in case the seller doesn’t cover it.