So the land costs $300000 and it has curbs and gutters and to build 10 beds which is a teenie tiny operation you need showers, sinks, a nursing station, electronics and ADA compliance so to build a 4000 square foot place it's going to cost $1,600,000 (architect's plans, cost breakdowns, contractor. permits, state inspections...)   

There's always a need for more ADA compliant STR, so I would try to make the property accessible to those with disabilities. 

ADA issues grandfathered in or do you need to fix.  

This could mean apropriate fire suppression throughout the building, potentially adding elevator, full ADA compliance, etc.  

I have a contract on a 14 unit, 9 Baths, community kitchen/bath, ADA compliant,  single room occupancy.

See number 2Sometimes defining your objectives will help you answer your own questions.I look ar it as define your goals and make a plan to execute them, those may change over time & that's good because you're evolving ad a business owner.Dont forget your holding costs, taxes, builders risk insurance, utilities, security etc.Remember to manage everyone & be on site as much as possible.

For all my rentals I buy this one at Lowe's:AquaSource Henshaw White WaterSense Elongated Chair Height 2-Piece Toilet 12-in Rough-In Size (ADA Compliant)Item #98923Model #T802The price is right, it lowers the water bill and the tenants like it. 

The Americans with Disabilities Act (ADA) enforces elevators in properties in the following criteria: ...

If they have not confirmed an hour prior to their appointment, I send this text to their phone (which was required as part of their contact information I required in the response to my ad):As I had requested in my email, you have not yet confirmed your apartment showing for this evening, scheduled for 7:00pm.

Make your ad as thorough as possible, including what the requirements are.