The caveat is that every investor is different so choose a methodology that works for your business model. 

Since you have a really awesome methodology for teaching yourself, I'm curious, what do you do to "test" yourself? 

Using this methodology, they stand to gain from either the wholesale fee, or the commission from the sale of the property to a "Retail" buyer. 

But w/value add apts of any real size, appreciation takes on a whole new concept.When we are talking larger apts, commercial property valuation methodology (based on property income) not so much sales comps apply.  

The rate of increase has sped up in recent years but it's not exactly earth-shattering.Median down payment at 10 is  interesting, but sourcing and methodology are needed:http://www.prnewswire.com/news-releases/down-payme...

any recommendations on bill back methodology AND how to approach the tenants would be appreciated.  

This is because there is, in reality, no one methodology.

@Curt Smith As far as your description,the valuation methodology is similar as apartment building (NOI/Cap Rate).But I think MHP different from apartment building is the exit strategies and finance part,can you explain more on these topics?

@Jeff Costa While a cost segregation study may seem like a simple concept, it's actually a very complex process that requires significant documentation as well as specific methodologies.

Not the best methodology, but if I get burned for a few hundred bucks I can live with it.