grandfathered-in MHP questions

[Nora Santana]

hello, has anybody run into this scenario before: I am doing due diligence on a grandfathered-in MHP in a city that does not allow MHP anymore.  it's a MHP built in 1977.  I tried to ask the city zoning to see if there is any restriction with replacing the older MHs with newer models and to infill vacant lots, but did not receive any conclusive answer from them. My question is: is this MHP worth pursuing ..?  If it is, is there any 'security' letter I can get from the city to make sure they wouldn't cite the park with non-compliance in the future..?

thanks in advance for helping.