Our rentals are assessed below market so I keep O'Connor on them which I think helps keep values down.

The primary requirement is at least one of the owners is required to be an active pilot.The the FAA Modernization and Reform Act of 2012 (https://www.faa.gov/airports/airport_compliance/re...) resulted in the laws being setup for these types of communities called "Through the fence". 

The “non homestead” assessment increase cap is 10% Per Year.

I recommend you visit this site - https://www.hopb.co/nevada/ - and do a little research into what Nevada statutes say/define "reasonable" where fees like what you are being assessed are concerned.

Taxes alone are $3000 for one of my properties (assessed value of $57.5k). 

I feel as though I can assess this part of the deal better than the MHP.The MHP is more complex. 

Will they be able to offer up a more accurate assessment of ARV when needed?

I'm assessing another property and it doesn't appear to be as good of a deal ($80k $900/month) but in an area with exciting developments and higher potential for increase in value.

I've joined a few REIAs and am actively looking for who in the group is doing the most deals and how I can be of service to them. 

Good question Sean, I actively try to sell to my tenants and select tenants in large part based upon their interest in buying and credibility to do so.