If so, then find out what you have to do to have him removed as domestic violence allows the tenant to move without 30 days' notice (to ensure her safety). 

And yes, that's a rather accurate measure. 

The city sees it as a safety issue, they will do it, but its rare.

My concern is whether the city could deny permits for these modifications, such as removing walls or converting a garage, or if they are mainly just concerned with safety and habitability.

I took notes what you said, and this really does help provide measurable action steps for me in the near future.

i do not disagree with your statement and when i pay my house off next, I will use that approach and keep the HELOC as a safety net in case I need to write a big check.What I love about getting to the airport is that there are multiple ways to get there. 

It’s a great way to measure if the investment is worth it!

I guess for me the dividing line is does it damage the function or cause a safety hazard if I leave it on the tenant.  

If they find something I didn’t know about and they couldn’t have, or safety related then I’ll consider/cover some of it.

Make a Rolodex of them for later.2 - Complete your design plan - i.e. take measurements and come up with a plan.