I am looking for advice on how to forecast property taxes for my financial model. 

The group knows their stuff and is filled with a vast array of experience, expertise, personalities, ambition, and what-have-you.

I agree with @David Dachtera, see wise legal counsel; anything more than personal advice is outside my expertise.  

I just looked online and they are $898... possibly store specific then (maybe a floor model I saw).

The home is in a park near to where i live. the location is good. its a late 70 model so its old and needs to be fixed up.

And in my experience, that is just not true, as some people just value themselves too highly for the actual service they provide, and you need to weed them out of your business model.  

App. 1986)well that pretty much explains the whole business model as taught by wholesale guru's webinars etc..

I want to create a statistical model that can predict if a certain construction project will succeed or not.

Another question, any good models for valuation? 

You want some fast cash flow (you have the skills and expertise in assignments)You want to Buy and HoldYou only want to assign your contract (assuming you have the skills to control the property)You know exactly how much you might make on the transaction because you understand that local market - the comps help and your gut says GO FOR IT!