He is purchasing the property, not a lien against the property that is past due by the owner.  

in im eastern mass about 30 mins from boston. i want to either have my girls parents live there for cheap rent  as an inlaw's kinda deal or move in myself and rent my unit... is this even possible.

True market rate rent is going to start to become a thing of the past the way things are going.   

I am happy to post some information and pictures as I have in the past. 

Can anyone give me an idea of what market prices have done there over the past 3 years, or point me toward a local pro that could assist?

They might have  a better idea working with the city or county in the past what they require.

Their care for their unit and the lot around their unit helps the overall park out.There are lots of benefits of mobile home parks if you can see past the stigma of owning a mobile home park in the first place.

Family lives within 50 mins max of the property.

Hi BP Communtiy, as promised, I want to discuss how i fell into the real estate industry with my first family "deal"My grandparents have lived in Cambridge, MA (10 min walk to Harvard Sq) for 50+ years in a duplex.

My first property has had the same tenants for the past 7 years, my second has only had two different tenants in the past 6.