If you have a running engine, it’s not a bad price for what you’re getting. Grease the bearings well on the trailer before moving it, can use a handheld temperature gauge to check the bearings after a few minutes on the road to see if they’re heating up. When you say floor and bulkheads are shot, meaning soft spots? Feeling spongy? How long would you plan to keep the boat? It might be useable as is for a while, or if you plan to keep a long time, could bang out the project off-season and be good to go next year.
note that you may not recover the full cost if you do the project (especially if you pay someone else) and plan to resell soon.