On new constructions in a fairly new area, how does property get appraised up to contract if there are very little or few comparables around?

Hi Napat,Make sure you are comparing Apples to Apples.For instance is the Contractor going to use Owens Corning Synthetic Underlayment, or X mil plastic sheeting or tar paper, or nothing because he believes (for instance) hail damage is less with nothing under the shingles, and the Ownes Corning guy is going to use the Owens Corning Synthetic Underlayment (???)

All add by saying start talking to lenders, you can start comparing the different products and requirements to get qualified.

Worst case scenario is not being able to refi unless I come up with $50k.Austen Mueller, I tried using the duplexes and square footage to formulate the value of my 4 plex but was told that they do not translate and they would only compare another 4 plex.It seems like I may have to walk away from this deal. 

Your best bet would be to contact a local bank where the mobile home park is as they're more likely to lend compared to a nationwide bank not familiar with the area. 

Start with no less than a 4-plex because when you increase the rents for a 4-plex your profits are almost exponential compared to a single-family home.

A good rule of thumb is to compare the extra 5-10% down you are doing and the monthly payment with the higher interest rate.

I’m trying to compare other commercial properties that are similar and I am having a hard time doing that..I know commercial properties are compared differently than residential. 

What are the most important items to compare?

If you're talking about how to reimburse yourself with respect to your investor/partner, if I were that investor/partner, I would expect you to pass one the actual cost of that employee to the project.That said, I would also want to see multiple bids indicating that the cost of that employee was comparable to hiring a third party.