There i a bit of research that needs to be completed early on in order to get a good judgement on the feasibility of this; from there, the "Official" way to ensure you could pursue this would be to request a "Zoning Opinion Letter" to receive an Official decision from the Department of Zoning in order to ensure this will not cause any issues during your permit review. 

If it has a good review history, there probably isn't any issues with the place.

Its good to see that there are no issues at this point. 

Now, if you do not use a PMS and only have a few properties or only operate on Airbnb that’s a non-issue.

Then interview them.Now, let's look at your issues:1) How did replacing a toilet result in a burst pipe and flood?

Whether we agree with these items or not, the following are inflationary government policies: stimulus, student debt relief, tariffs, increased child tax credits, limited immigration, and big government deficit spending.

It might be wise to remove the listing, and relist as a brand new place now that you have a solid cleaner.Some of the comments show that the paint has issues etc.

Better than underground homes which have issues with moisture etc.

If your padsplit residents have vehicles that can cause parking issues.

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.