Hello Jorge,In my 25+ years as a real estate broker specializing in multi-family sales, I've only had to challenge an appraisal once.

While I don't know the nuances of the market, I do have a client that's a real estate investor and agent in Phoenix that could probably give you some suggestions.

My suggestion is to find some real estate industry surveys (via CBRE or others) and look for the MF cap rates in various cities/states/regions.

.-- But the real nail in the coffin could come in the Colorado legislature which is considering reclassifying STRs as commercial property for property tax purposes.

Focus on tax-saving strategies such as cost segregation studies and bonus depreciation to accelerate deductions.By qualifying as a Real Estate Professional (spending 750+ hours annually and materially participating), you can offset your wife’s S-Corp income with real estate losses, reducing your tax liability.

She is located there and lends all over the area so will have real-time intel for you.

I myself have been a Licensed Real Estate Agent in Southeast Michigan since 2021 when I turned 20 years old, and have took a bit of a hiatus since now to finish my Bachelors in Business Administration.

I do a good bit of long distance real estate investing and I am considering going into as new area. 

Real long story but he used to work in the area.

To throw a wrench into things, if we were talking about real property/structures that were being short term rented, it's possible/likely that your depreciation period would be 39 years, not 27.5.However, a vehicle - which is what an RV is, regardless of how you're using it - is 5 year property.