What brought me here was after 4 years of having tenants I finally came to a point where I'm dealing with my first late fee, call me lucky as that was a good streak! 

3) Are there any other things I should look at before making my final decision on this unit I have?

It looks like transaction activity has finally bottomed, but we’re still deep in the trough.

Finally, ended up offering it recently, it has not yielded any results thus far.

Even though a photo is within the sizing limits, sometimes just resizing it for the sake of whatever the software is throwing at you, finally works.

looks like someone finally took it over and its being rehabbed right now!

I used Semi Gloss . ( yes it shined for the first couple years , but it lasted 12 years until I decided to put on Vinyl to match the house 

We are ready finalize the plans & start permitting. 

I say that because you may have different inspectors calling out different items at each inspection for instance you may do a rough electrical inspection with one inspector and do a final with a different inspector that see's things a little differently forcing you to redo work already inspected.

HERS rating including DLTO calcs are the method to understand the envelope.FWIW residential HVAC industry is way behind the times.My only suggestion for the final question is be Polite, Professional and Persuasive.