@Al WilliamsonI am also considering installing a sliding gate & walk-in gate with locking option at a 4-Plex in Phoenix, but am in a dilemma.

We had to slide the bathtub out of the way and cut open the very same drywall that I recently had hung.

I've even replaced 2 vertical blinds on the rear sliding doors.  

However, if you need to cut into the joists to bury the beam you'd be looking at least a solid days work.We subsequently drywalled over the beams & that was about 2 hours.

A pitch book or 15-slide pitch deck is useful, even if a generic description of your business plan.

In subsequent years, you're looking at 36-50% CoC ROI on your $25k investment.

The seller is flipper that converted what was enclosed porch areas to a bedrooms by removing double sliding doors and enclosing it with walls, and also added closets.

You need to inspect the unit, take photos, etc to document the current damage/condition so that you can charge them for subsequent damage at move out.

If that doesn't work, I suppose the next step is a formal letter advising them of the previous personal conversation and lack of subsequent compliance, with some kind of date for compliance.

My guess is that your tax assessment hasn't caught up yet, and your tax bill is going to wind up being closer to $15,000 than the $5,000 you're showing (but hey, not really my market - that's just how I'd evaluate it if I were going to buy it.)Like I said - this may all very well be 100% true and accurate, but when you slide in that "I'm working on something bigger and looking for investors" line a couple of posts in, the alarm bells start going off in my head.