Lots of do it yourself equipment discussions right now. If you paln to only do one project, if you have time to do it start to finish all at once, then I'd definitely rent. I own a dozer and I've rented other stuff. Heavy equipment is expensive to fix but that cost can be outweighed by convenience if you want to do many projects over time or want to take all summer to build a pond. I rented a 36,000 pound excavator, 2 yard bucket with 36 foot reach for $250 per day. I dug non stop during daylight from the time it arrived until the project was done and I'll never have to fix that machine myself. If it broke I'd be out nothing but not getting my project done. On the other hand it would be nice to have the machine around so I can work on project any time I please. Not worth it for a machine that big. Any kind of repair would cost thousands. I'll rent the bigger stuff.