This will also allow you to sell fast diminishing your holding costs. 

Basically I was made to feel that it was a risky option and that my rights as a seller would be severely diminished.

Try to include them if they are financially feasible to do so.Keep in mind the diminishing returns to a renovation.

I have some questions in regards to making sure we structure everything correctly and not get to the point of diminishing returns. 

Keep in mind there is a small YoY diminishing return because the panels generate less electricity each year that they age, although this can be greatly offset by rising utility costs (which our local utility seems to do every year). 

I would like to buy another but my debt to income as well as my down payment bank is diminished.

While your COC may seem like a deal-sealer, it could easily be diminished by a maintenance or tenant issue.

Your post describes an elderly property owner who is no longer living at her property and who is in the care of others (diminished capacity). 

Typically if ARV is higher (above $150k) your cash flow will diminish (rent to value ratios decrease as ARV goes up).If ARV is too low (think $75k or less) then *probably* it's not going to be a very nice area. 

I see the $/sqft diminishing past 1200sq/ft, and my unit likely won't hit $100 for some years.