Additionally you are going to have to think about insulation (architect can give guidance on this) -- a converted attic will get extremely hot in the summer.It then comes down to costs of construction versus rents.

Your response was extremely informative and helpful, thank you!  

He has been extremely thorough.

Construction management mistakes can be extremely costly, and the best way to learn is going to be through experience.

Or just the junk she is not intending to take with her (which is extremely common)?

You will be doing it extremely dishonestly.Example:We flat out tell our sellers we are NOT going to buy the house.

We've got extreme hot-cold cycles that wreak havoc on our homes around here. 

The barrier to entry is high($) and the supply is extremely scarce.

This is a perfect BRRRR strategy as I was able to get an extremely reduced price and there is a LARGE value add opportunity with adding an ADU and upgrading the original structure.

The other Extreme is Dave Ramsey...you know the, "I'm Debt Free!"