Go to a rental centre and check the prices on fun toys for a weekend. The only difference between DIY and pros in this case is the toys. Check how much for a skid steer, forklift, etc. Ask the dude at the counter what equipment he recommends. Once you have said toy, spend an hour monkeying with it in the driveway to get confidence and skill, then go slow and git-er-done.
If renting toys is more than hiring a pro, just go with the pros.