Hope I'm not too late to the party.
Be careful with conduit loans. Some have onerous terms. And it may be difficult / impossible to get one property released if you choose to sell one and not the other.
You might secure the first park with additional collateral (another property your either own or will acquire). That may help the seller feel more secure.
More collateral = more safety for the note holder. Remember to work in release clauses after you've established a track record with that seller.
If you have some real numbers, this will make constructing offers cleaner.