I’ve had other random issues come up on holidays or weekends late at night with guests.

Good morning BP,I saw a post this morning that got me thinking about the biggest issue when it comes to flipping.

The recorded document will put the public on notice that there is an issue (cloud) with the title and that will prevent someone else from buying the property without dealing with you first!

Get an attorney familiar w/ working these issues.

I'm not that professional but I think a whole house filter would filter particulates like dirt but not chlorine. for chlorine you might need a reverse osmosis system for a specific drinking water tap to eliminate the taste as it's not practical or efficient to put an RO on the whole house supply. if skin issues from bathing are a problem you might need a softener. sometimes when kids have eczema doctors actually prescribe "bleach baths" where a small amount of chlorine bleach is added to the bath water. also many of the water treatment systems can be rented so maybe just rent it while they are there. regardless, proceed with data. water test, pediatrician diagnosis (if it's legal to ask for, no clue), and a system that is right for the application. sounds like the tenant is willing to help out which is awesome.

Main issue with house is the amount of mess left behind.

I want to focus this post on issues that have cost me money that were avoidable.#1 Fires, I have lost three homes to fires.

He finally replied a week later saying there was a title issue on each property and he was waiting for them to be corrected.

Are there other issues I should be considering?

This sounds more like a contractor issue rather than architect problem.