Buying an RV through a dealer or private seller?

I found my coach on an owner financed website. You negotiate with the owner on down payment, interest, length of financing. I got the owner to finance $70k interest free. www.dreamrvsforsale.com I purchased mine through the lease purchase agreement. The contract was checked out by a friend that was a lawyer that specialized in contracts. There are no red flags. Dream Finders provided me a service that banks would not. I've had my coach for almost 5 yrs now.