So you’re saying that the mobile home park is owned by the local mobile home dealer, right? That’s not uncommon, as many mobile home parks got their start as a side-business to the home dealer (an efficient process when the customer did not have land to put the mobile home on). The only downside to these sellers are 1) they normally want too much and 2) you have to be careful that the parks are not filled with new homes just waiting to be repossessed.I would just call the mobile home dealer and ask for the owner. Or you can send him a letter. Unlike the park manager, the salesmen at the dealerships will pass the letter on, because they could care less about the park.