We don't want to bring on every owner or every property unless they fit within our target market, so, I do the far majority of the sales - this is our check and balance.

Of course another possibility that the work done was subpar and the seller has a legit issue with the billing amount.  

- The current low rent is probably to offset maintenance issues at the property.- Try to raise the rent and the tenant will give you a list of all the maintenance issues they want you to fix. --- They will offer to fix them in exchange for lower rent, but ask yourself, if the tenant has been living there for 25 years, why isn't everything fixed already?

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

The issue is that you cant cold call people in New York 

If you are near a major city like Austin, you will always have a stream of guests you can find.

I am on the Neighborhood Building Owner's Alliance weekly calls, and we had this ADU issue come up.

(Not factoring any issues)  Is this a bad deal?

As a loose rule of thumb, I have heard a primary residence requires the owner lives there the majority of the time each year (i.e. more than6 months), but a lender should be able to confirm the specific criteria.

This cultural preference for renting creates a steady demand for rental properties, ensuring reliable cash flow for property owners.Additionally, many Germans face a significant shortage of affordable housing, particularly in major cities like Berlin, Munich, and Hamburg.