I might add a bit more colorful artwork on the walls here and there. 

Quote from @Jaron Walling: You can't 1031 exchange a flip. 

All new electrical, plumbing, flooring, kitchen, bathroom, walls.

Be sure that the plumbing and electrical are all good before replacing walls or ceilings or you could have serious trouble and expenses down the line.Regarding finances: I have used QuickBooks Desktop version (saves a lot of money but does not get the constant updates) for five years.

What scares me the most is the social action side of Airbnb which could lead to overnight deplatforming because they do not like where you stand on social issues, or refuse to sign a pledge, or you put a quote from the Koran, Bible or Torah on the wall at your STR.  

Quote from @Jaron Walling: Deductions on income and showing a loss!

For you, living in a househack is a means to an end.That being said, I once moved into a house with a bathroom that had a black ceiling and deep purple walls.

First time I did it there was an entire indentation of a persons upper body in the wall. 

Often with wall hooks instead of full-on hangers.Also, Craigslist and garage sales continue to be a source of affordable furniture gems for me. 

List of things to fix:Clean house, Carpet replacement, Floor patch up, Interior Painting, Bathtub recaulk, water heater replacement, leak check, small dry wall cut and restore, Roof fascia repairThank you.