Just happens to be on the ground floor level of my house. 

Quote from @Tim Delaney: @Marty Boardman thanks for sharing - just to be clear you put all your expenses related to the house under one capital improvement account t (Wip) and do not bother breaking them down into categories like kitchen and flooring and paint, etc?

Quote from @Cliff Song: Here's a metaphor.You: "What's the best flooring material for my in-home basketball court?"

Typical cosmetic (lifestyle) upgrades we do are better/more LED lighting, dimmers, flooring, paint, trim, solid wood door slabs in place of the hollow core etc.

You also can have someone who uses matterport or other software to scan and create floor plans if that’s all you need and that costs like 250

Refinishing the hardwood floors3.

As you have really good credit, you would be getting close to floor rates (mid 6s).

. $30K should be more than enough for fresh paint and flooring and some other odds and ends, but if you need dry wall, cabinets, countertops, mechanicals etc it could get much pricier. 

However, the inspector mentioned that the 2nd and 3rd floors are labeled as "Artist Dwellings," though he wasn’t sure what that fully entails.He suggested applying for a special permit to present the space as artist studios or dwellings, with the hope of eventually converting them into long-term rental (LTR) apartments under that designation.

Faucets are older, towel holders are older, floors are older.