They've already talked about issuing fines to landlords that have units vacant too long.

Ensure separate bank accounts for the LLC, and maintain proper formalities to avoid liability issues.

What type of interview do you do with existing tenant(s) to ask them about maintenance issues?

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

The company I use has patched the issue since then, but security is ongoing, of course.

It ended up okay, but it sure taught her to slow down and get comfortable digging deep into the due diligence.Here in San Diego, I’ve seen the seasoned investors always double-check with a well-regarded local title attorney..I’ve heard there are a few firms around downtown that specialize in smoothing out odball title issues..or a trusted property manager who knows what unique fees to expect.

Home could've settled and nothing further to do or you could be seeing a bigger issue at hand that the seller needs to fix.

Always fix all water issues first before moving on to doing major repairs of a structural  nature.  

Some have mentioned issues with the Indianapolis Housing Authority, including delays in payments and cases where landlords with new tenants haven't been paid since January 2024.Do any local investors have insights or experiences with this?

There should be no legal issue with you just raising one rent.