I assume something in the lines of X% if built between Y and Z, A% if built between B and C, etc... would be good enough for quick evaluations?...

That is not 100% accurate also because it is often done by a third party company who does 'drive-bys' to evaluate properties.

Good wholesale deals are gone in a matter of hours so you're not going to have a lot of time to spend evaluating it.

A dump needs it anyway and then that's a pre-purchase evaluation anyway.  

But that would be true with any method of evaluating a deal. 

My question here is about how you all would evaluate this scenario.

@Bryan ChampHere're a few points to consider/analyze:1) Just like with multifamily, you need to evaluate supply and demand in the area2) What is the MHP size (in other words, how many pads)?

To answer your question, you need to do a full evaluation of all the expenses on the property to "back in" to your offer so you know what your return is potentially and whether or not that is acceptable to you.

Looking for a CPA with strong business evaluation / valuation skills.

Now, on a personal level you need to evaluate yourself to determine which investment vehicle you realistically expect to fund your retirement.