Renting out a room is a great way to get started, and I wouldn't get too settled into the "going rate" use that almost as a floor. 

Talk to other clients, go look at his current job site and see how clean it is, the quality of work, if the order of operations is making sense so far, etc.PS I'm a GC in the Nashville area and can take on a handful of clients in 2025 if you need me.

They have to keep nose clean, there now in the system, tax's and all regular everything.

Marble counter tops, textured floor, etc on theinside.

Best way to find end buyers is to ensure it's well marketed - Professional photos, professional clean prior to listing, aggressive list pricing.

Its like the Airbnb that says $20 a night but when you click its $100 cleaning fee. 

Not that I don’t enjoy dealing with tenants, maintenance, lawn care, Home Depot and Lowe’s trips and tenant change overs (I recently put new carpets, kitchen floor, appliances, vanity and mirror in the bathroom and fresh paint in my upstairs unit).

LL would have no incentive to paint, update flooring, etc.  

Cash flow can be great if you manage it well and keep occupancy rates high, but factor in the added costs of management, cleaning, and potential vacancy dips.

For a one-bedroom, cleaning alone would cost around $200.00 in NYC.The fact of the matter is many landlords do not know the going price for labor and supplies.