I'd be inclined to agree, only on the condition that there's plenty of unused land around, available for next to nothing. If that's the case, this trailer park

I'd be inclined to agree, only on the condition that there's plenty of unused land around, available for next to nothing. If that's the case, this trailer park owner is getting a return on her investment. However, if there isn't marginal land available nearby, a portion of her return is monopolistic-- the renters have no alternative than to pay rent on this land.