Being that I purchased my MH the same way, hopefully I can add some good input.
We flew to FL and drove ours home last August - 1600+ miles to upstate NY (including 1 or 2 sightseeing detours). As previously mentioned, the mechanical basics are crucial - Tires / Oil Change & Filter / Fuel Filter & Water Separator / Air Filter / Suspension / Lights / Fluid Levels. If need be, plan on visiting a mechanic to avoid on the road surprises. The cost and piece-of-mind will outweigh the headaches of being stuck someplace.
Tools - I took an entire tool kit with me on the plane. I priced shipping it ahead through UPS - Actually would have cost me more than the extra fee that the airline charged for the suitcase that I took with me (Filled it to the max limit of 50lbs). Socket Set / Screwdrivers / Wrenches / Multi-meter....
Have a thorough walk through provided by the seller - Fully operate all slides / jacks / appliances. Don't be afraid to ask any questions, even if it may seem to be dumb - The only bad question is the unasked one.
We spent two nights at a campground in the area prior to heading home. 1 day to familiarize myself with the MH, 1 day to do some sightseeing. Purchased bedding / food / household supplies at Walmart - Make a list as you go along to cover what you think you might need.
Trip home - 3 days - Could have made it in 2 long ones. Made 1 planned side trip and 1 spur of the moment decision (Routed over to Altoona, PA to watch some trains at Horseshoe Curve). Had route pre-planned including overnights and food / fuel stops. Other than staying on I-95, the original plans went out the window. The internet is great for gathering info on the road - Be flexible for schedule changes.
Kids - Did my trip with my 15yr old daughter as copilot. Even 15 yr olds get bored easily on the road, even with their electronic gadgets. Keep the kids in mind as you prepare for the trip and on your way home.
Hope I added some insight for your upcoming adventure - Congratulations and here's to years of enjoyment and memories with your MH!!!!!!!!!
sfi4 (RVM 44)
1999 Harney Renegade Classic / 300HP Cat 3126B / Magnum Chassis / Blue Ox Aventa II / Brake Buddy Classic / Toads - 2003 GMC Envoy XL / 2013 Jeep Wrangler Unlimited