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.
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.