.- Tenant Accountability: Many programs have strict guidelines for tenants, and breaking those rules (e.g., property damage) could jeopardize their assistance, encouraging them to be responsible.- Inspections: Some programs require annual property inspections to ensure compliance with their standards, which can occasionally be demanding.- Damage Risk: As with any tenant, there’s potential for property damage.

If they are CF positive then they will not cohnt against your DTI but will improve it...that's standard conventional guidelines barring a few exceptions.

In many places, commercial leases have different guidelines than residential, so it might not require 120 days.

The underlayment should be durock or other concrete board.

Also you can find lenders that are a lender (have their own guidelines and terms) who can also broker to make sure you're getting the best of both worlds. 

The 1% "rule" is not a rule, it was a simple guideline that was supposed to help do a quick initial vetting of a deal.

Infeasible.To build out of concrete block. 

With the advancement of concrete in the last 100 years or so, you don't really see wooden piers.

I think my personal guideline will be 10 properties, or $2k in cash flow a month.

Nothing worse than walking up the front of the house and having a broken up concrete walkway.