It has been a game changing tool for me.

It sounds like you're struggling with the basics.The best advice I ever received from a 75 year old mentor, was "Make your mistakes on paper. 

and it currently has "wall/window AC" that looks horrible (old style, dirty, randomly located like under the window or high above the window) so really bad for marketing the unit in STR platforms.I want to change them ASAP!! 

And that was the best decision I've ever made.

I've been told that Mountain West Credit Union will provide it...but nobody there has ever called me back - ever.  

I don't demand anybody change.

So, I got 9 new investors into their first ever loan last year and the two caveats I have are credit and capital. 

Observation of the plumber: it was connected to a public sewer but it was changed without permit.

Just made the change on Vrbo and Airbnb,  but We have families vacationing at our properties and it costs so little compared to my rental rates.I have nor rented a place because they didn't have satellite TV or cable.

I've worked with many investors who sought a life style change and wanted to take a more passive role in their real estate.https://www.biggerpockets.com/member-blogs/7993/48729-are-yo...Hope this helps.