If you do this, make sure you have clear intentions and written terms each party agrees to.  

It could provide valuable insight into timing your refinances strategically across 3, 5, 7, or 10-year terms to hedge against market fluctuations and avoid unnecessary risk.

But to date, I've just set my rents at a rate that accounts for me having to pay the water bill - and informed the residents that each year I'll increase the rent based upon my expenses (including water), so keeping the bill down helps me to help them.But one problem this could cause is if increasing the rent to cover the water bill then places your rent above the market rate.

Does anyone have experience with a property manager for a STR in the Ft.

The issue is that the lender  is looking for comps for a duplex, where 2 units were packaged together and sold together, but no comps exist for that in this neighborhood since all townhomes are being built and sold individually. 

Is there supposed to be some "problem" we are looking for in this?

While I am an attorney and lean on those skills I would be more inclined to consider my career that of a real estate developer at this point.

What made you interested in investing in this type of deal?

These items depreciate in value over time.

Find an architect who specializes in this type of work, and who is very familiar  with the building department