We were married over a year ago and I moved into her condo and we put the other condo up as a short term rental. 

The wooden cabinet holding up the sink begins to rot.

Congrats - seeing a lot around a big bounce back in Joshua Tree right now, probably overheated up too much in 2020/2021, and then overcorrected in 2022/2023 maybe 1h 2024, now some nice opportunities again!

I'll wait here while you go whip one of those up."

Im a realtor and a pm up here.

Even if you did entire build yourself, I think you are looking at 2.5 times your estimate and a lot of work and time.I suggest you go to some meet ups with an emphasis on understanding the value added by ADUs.  

Automation tools like Hospitable handle pre-check-in instructions, Wi-Fi details, and even friendly post-checkout follow-ups, all while making guests feel like they’re receiving real-time communication.Effortless Five-Star Reviews: Automated review requests can be timed perfectly to boost ratings without the awkward "pretty please" messages.

I've been waiting for this property to come up for sale.

Lots of smaller towns up and down 75 are in need of housing.   

You can also just snap a pic with your phone and upload to Google drive, dropbox, etc.If you adopt software to keep up with your bookkeeping, most of those will have an app with receipt capture.