It is the State capital so there is always economic development happening which drives job growth and demand for housing.

Rising home prices for developers isn't new, but if you were in contract, what they did is most likely illegal.

I also understand that the Mexicans are trying to welcome us as well as they can while providing a decent livelihood to their population.

Also, a contractor may not be the best person to develop your scope of work! 

I'm an investor and flipper in the city, and I work for a developer focused specifically in Lowell as well.

Your development deal will look much like a flip in the eyes of the IRS since it is 6-9 months as well you'll have the short-term side of taxes, not the capital gains taxing on it.  

In my developments, I went to everyone I could in the area and got the most RELIABLE (not cheapest) person in order to make my numbers work the best. 

We expect to be in a position to redeem your interests in short order, and we will keep you posted, as always, on any developments in this regard.We understand the importance of distributions to our investors and recognize the impact this decision may have on your financial planning.

Always approach as a developer with a specific usage.  

So, if a developer comes along and buys the mobile home park you will lose your entire investment.