MY paint cost is $1-$1.5 per sq foot.  

Dry wall finishes with the right paint to hold up with the humidify of a bathroom 

If there is time and money available that is the opportunity to make a choice, but that usually involves INCREMENTAL upgrades like painting a room or replacing the flooring in a room or 2. 

Are you looking for a full studs deep remodel, lipstick, or the carpets and paint?

The Brrr principle seems to be hindered (at least that’s what I witnessed buying my first house where chipping paint was even an issue).any thoughts are appreciated

Doors , windows , kitchen , and baths plus holes in the walls , entire paint job , holding costs all for $40K . 

When I've studied my competition in the past, I see people ripping into cabin rental companies, Vacasa, you name it, for things I think they'd never complain about at my place.

It needs two sets of new stairs, new doors and paint throughout so i was hoping 15k would cover it.

I added extended driveway, RV parking, back yard landscaping w/ covered patio, shiplap on two interior walls, and painted accent walls in every room.

Paint, flooring, landscaping, some new appliances, fixtures, hardware, etc.