She also put in thousands of dollars to make improvements which include a bathroom, and two more bedrooms.

Try looking into zillow/Redfin and see what your potential rents you can get near the neighborhood by filtering the bedrooms/bathrooms of the intentional property that you are planning to buy.

To add a bathroom in the hood versus the primo areas is about the same cost; the return is completely different.I buy most STRs full cash, and re-fi out with under 30% in LTV.

Accessibility features in the bathrooms?

If they are 3/1's I would 100% add another bathroom in each unit. 

The rooms with private bathrooms get $1000-$1175/month.

Purchase price: $223,500 Cash invested: $61,825 Sale price: $285,000 We purchased a 3 bedroom 2 bathroom Single Family home and barely broke even after the remodel.

I have tried well over a dozen times to upload a bathroom photo.

It would allow for more shelving in a small bathroom that has zero shelves.  

It wasn't clear if all the outlets in the kitchen and bathrooms were GFCI like they should be.