Since you appear to be a new member, welcome to the forum!
I suppose the answer depends on how much you value being able to do projects when you want, where you want more than the cost of the BH alone.
Renting is often just the answer, but keep in mind you have to do that based on someone else's schedule of delivery and availability, not yours. Waiting for delivery and pickup can get hairy at times, often cutting into the time you have for doing the project itself.
I bought my BH without truly knowing just how much I'd use it, and I've found it invaluable in getting my properties back up to snuff when I wanted to do the jobs. No waiting around, no problems with availability.
I don't use it all the time, far from it, but it sure has saved me a lot of wasted time, and money I might have had to pay someone else to do the many and varied jobs I've done with my very own BH. Trenches, stumps, planting trees, digging out overgrowth and saplings etc. have all made the purchase price worth it to ME.
John