Attorney tells me we are still waiting on abstracts, surveys, etc. and that is what is holding these deals up??

It sounds like from your post that there may be an existing garage there currently, but the original surveyer screwed up. 

Go over to survey the extensive damage.

Here is the reality, your chart proves they do not appreciate because in the most recent data (March 2023) from the Census Bureau’s Manufactured Housing Survey (MHS), the average sales price nationwide for a new manufactured home was $128,300 or almost $45k higher than the current price from your chart).Every set of data presented in the chart shows the value below the current cost of a new Mobile home.  

PHX has a hillside ordinance that's not that easy to navigate, so you may lose SF due to excessive slopes or what the ordinance dictates.I'd suggest doing a bit more research - can you get a survey of either property? 

A staked survey even if the property is fenced?

A recent Zillow survey showed that more than 4 out of 5 prospective home buyers consider climate risks as they shop.

The survey didn’t account for higher rent, lower vacancy and higher quality tenants.

On the surveying side, my company can help.

According to this Gallup survey, real estate is the most trusted asset class no matter the household income level of respondents.