Just be careful what you will do with the home. If you set it on a leased lot or in a "retirement" community you run the risk of the community going broke and kicking you out. Since it costs over $10,000 to move a modular home you should consider it.
Also, the home depreciates in value just like a car unless it is set on a permanent foundation.
With all that said - I tried to encourage my DH to consider buying a modular home in a "50+" community. There were several here that had a pool, gym, social activities, landscaping provided, etc.
He would not consider it and now he wishes he did.
One wonderful thing about those homes is all the built in storage!