They claim is has just recently started to warp and peel up. 

It deals with removing wallpaper but not necessarily “paper” but the green overlay seems to be more of a thick craft-paper type of material compared to wall paper which was easy to peel.

With that being said, you can require masks at showings or proof of vaccines if you want to keep everyone safe.

that's the first answer you have to find. once you find that, there are multiple exit strategies. for example, I'm living in my first investment. it's a live in flip. no floors in two bedrooms, 1956 house with cheap peel and stick flooring in the halls and kitchen. rough hardwoods in the living room.

One bathroom has peeling wallpaper (the current owner went to tear it out then gave up). 

Every review of my listing cites the decor and uniqueness of our property, which is tiki themed.Mine isn’t crazy, but my wife built a 10’ tall plant wall, we have dozens of tiki masks everywhere, fake birds in cages, a diving helmet, vintage pieces, handmade art, and every room is tied to the theme of the property.on the flip side, in my super competitive STR market, I see a lot of future listings hitting the MLS because they aren’t adapting to changes in the market, and the changing demographics of who is visiting.

It’s important to put your oxygen mask on first, remember!

They (all the tenants) should have thought of a plan-eg the person with covid is given a bathroom to use and they figure out the kitchen situation, so they aren't in there at the same time, plus the covid positive person limits their time in the shared space and is always wearing a mask.The 5 day quarantine followed by 5 more days still wearing a mask (for unvaccinated people) can be challenging in a shared house. 

Started doing orange peel texture on walls and knockdown on ceiling and really turns any dated property into a modern.

Now just keeping my eyes peeled for another investment.