If it's set up well, regarding venting, avoiding moisture, etc, you should be ok on maintenance and it will more than pay for itself over its lifetime.

(years of clogged gutters lead to foundation problems, rot, moisture intrusion and termites)  Is the yard graded away from the house?

For a bathroom, tile for sure because it's not a ton of space and you want a better reaction to moisture.

Durable, withstands moisture, inexpensive, quick and easy to install, flexibility to change out as needed, and the tenants like it.

But having mold inside walls requires first to have moisture inside the walls, which in fact is a major issue!

Does not remove moisture so not very effective if a lot of humidity is present.

Try to do your soffits and roof at the same time (after the vent fans so those roof penetrations can be properly flashed) so that you can make sure your drip edge is properly installed.

It is 100% your responsibility to report maintenance issues.Here is a list of items we want to know about immediately:Mold (within 48 hours)Drippy faucets, drippy pipes, or “running” toilets (within 48 hours)Moisture where there should be none (roof, under the sink, on a ceiling, etc.)Maintenance RequestsPlease submit your Maintenance Requests via email to: YOUR EMAIL ADDRESS.

Soils below the uncontrolled fill were moisture sensitive, highly compressive soils down to refusal at depths of 45-67 feet.

Mine Had termites in the back exterior wall, in the floor joists, moisture %'s upwards of 75% in the crawlspace wood, and needs joist repair before it would be considered "livable" by a bank.