There are many ways to do it but here is the way we bought ours from a private seller.
Once price was set we got a negotiable check from our bank. We went together to the sellers bank & sat down with one of their officers who opened an escrow account. Our check went into it. The bank took out what the seller was owing on the loan. The bank gave us the title, which they had. The seller got the balance. The escrow account was closed.
Fifteen minutes without the small talk.
What should you be aware of? You should be aware that 41' is one big rig. Besides having a capable truck to pull it, also big, you need to understand that there are many places that you might like to take it that you won't because of it's size.
About any private CG with FHU will accommodate you one way or another however many SPs, CPs, NPs & even BLM access will not. Size really does matter in this game & once you go over the 35-36' length site options rapidly decrease.
Something to think about.