They are typically big ticket items like furnace/ water heaters/ ac.

Also, in my experience, it's typically much easier to negotiate with another agent.

These people typically look for retirement housing that allows them to visit mom and dad in nearby care facilities, and they're also worried about aging in place themselves because they have firsthand experience with the problems of noncompliant housing.As far as I can tell, astonishingly, no one else is doing this in rentals in Pittsburgh, despite the obvious demographics. 

For example, if they have 30% equity for a $100k listing, your minimum offer will typically be $70k because that's what they need to pay the remainder of their loan.

Typically, can vary in markets, a vacant infill lot is worth about 1/4 to 1/3 of a newly built house.

My CPA/attorney can do it for me of course but wants $3500 to do it, which is typical for CA. 

Typically your monthly lease payments with solar are less than the electricity bill would be without solar, so it’s a selling point and benefit for your renters (who doesn’t like reduced utility bills)?

The residential investors just typically do not have the network or know where to find them.Personally and it is just me I do not enjoy SFR and the residential tenant.

This is usually too technical to mention to borrowers so typically I tell borrowers that the gross rental income from all units must be .90% of the sales price or higher in order for FHA to finance the 3-4 unit property. 

Scenario A (typical) - $500k duplex-$125k down-$375k mortgage at 4.6%Scenario B (modular financing) - $500k duplex-$125k down-$260k mortgage at 4.6%-$75k HELOC on primary residence-$40k loan against 401(k) (technically this would be $165k down, but you get the point)In scenario A, paying off the mortgage quickly makes zero improvement on cashflow until you pay it off completely, or refinance, and there's no point in that if your rate is locked in lower than current(or future) market rates.Scenario B could involve higher interest rates on the HELOC and the 401k loan, but you have multiple, simple, easy options for increasing your cashflow, and then you don't end up playing as much in the overpriced, volatile stock market.