Around here in NY a mini ex rents for $325 a day or $1300 a week. I have a buddy who's not equipment operator borrow a JD 1025 from a friend to dig out a 40 yd pistol pit. He had to learn how to use it while doing the actual job, in between working nights, mandatory over time, weather, and other projects around the house. He had the tractor for 5 months, doing a little bit each weekend it didn't rain, and occasionally during the week before work. It would have cost around $10,600 renting each weekend, plus transport time and fuel picking up and returning every week, and potentially taken longer due to that. Weekly would have cost $26,000, assuming he could keep it on site each week. So if you have a project like this lined up, paying for the BH would save money even if you never used it again.