Am I getting in on the right side of depreciation?

I am considering a property that looks like an outstanding deal. It is a pristine manufactured home which to me basically looks like a double wide on a permanent foundation. It is over 2000 square feet in a gated community with outstanding city views. The land which is a small lot is included. All the houses in this community are of the same type, all manufactured on permanent foundations. The surrounding neighborhoods are real, new homes between 125K and 300K. The area is still largely undeveloped and potential for growth is only a matter of time. A new, very modern city high School is being built next to the division. 3 years ago those houses sold for 170K, I am in a position to by this house at 70K with the appraisal coming in at 90K. Now given I will have all the proper inspections before I purchase to insure it is not a issue with this Single property. That being said, is this normal depreciation for a property of this type given the current housing market? If I am on the favorable side of the depreciation, what can I expect the property to do in the next 10 years