I've had to move two safes by myself, one weighing ~650lb loaded on a trailer, the other weighed ~875lb which was fork-lifted into the back of my F-150. If you use your head, and don't have to go up and down stairs, it's not a big deal. I'm 5'8", 190lb, and in my 50's. And did I mention I was cheap, and that's why I didn't "hire this out"? (I was also new in town, without any neighbors nearby, and by myself. My wife across the country, not that she coulda done much but hold doors.)
Have them load the safe onto your trailer on its' back, on top of a piece of plywood if you want (that'll save the safe's paint job on the back when you slide it). I'd suggest an industrial grade hand-truck over a dolly (I preferred a hand truck because I was by myself and couldn't figure out how I was gonna get a safe off a dolly by my lonesome without losing it; I had an $80 handtruck from Orchard Supply). You'll need ratchet tie-downs. Get four or more 1/2 - 1" wooden dowels. When you get home, attach a couple of shims to the bottom so you can get the hand-truck under it (duct tape will work for this). Then slide the safe off the trailer to its' mid-balance point, and allow it to gently drop to the ground. This is the only hard part--> Watch your toes!! If you're successful in conserving your toes, you'll have it on the ground, leaning against the trailer at ~ 20-45 degrees. Then you can stand it up a couple ways. Muscle it, depending on it's angle, or strap it (with enough slack) to the trailer so it won't tip all the way over and fall on its' face when you stand it up, and back the truck up a foot or two, til the trailer stands on its' base. (It works; most don't think it will, that the safe would slide, but it doesn't. That's how I got the big ~800-something pounder off the pickup truck by myself; and the small safe off the trailer is a piece of cake this way.) Then slide the handtruck under it, get it to the room it'll stay in, and tip it onto the wooden dowels. Remove the shims, and roll the safe into place. The last dowel is a trick by yourself.... duct tape (what else?) a length of rope to the last dowel, tip the safe (a neat trick with any safe, by yourself) and yank the roped dowel out and drop the safe onto its' base again. I tied the rope to the last dowel around my ankle and just 'pulled' really quickly and hard, once I got the safe tipped.
To tip a safe when you're by yourself, tie a ratchet tie-down around the circumference of the safe below the safe's door handle, then tie another to any desired point and route it across the top of the safe so you can tip it from whatever side you want. It still won't be easy, but coming across the top with the leverage point on the opposite top side should give you enough leverage. It was good enough for me, and I ain't Arnold.