$9k is a lot of long weekend backhoe rentals. And that's a real construction BH, delivered to you, hauled off when done, all you do is use it and put fuel in.
Just pointing that out. I initially went the route of buying an old used backhoe. Way more trouble than it was worth - worst "good idea" I ever had
I think it's around $1600ish for me to rent one for a week which includes tax & delivery. I have to buy fuel too. About 1/3 of that to get Friday morning & have them pick up Monday morning as long as I don't put way over 8 hrs on it. - 1 day rental + delivery. Last one they brought me was a JD 310SL - cabbed, 4WD, 100HP, 8 tons, >1 yard bucket. With a little planning and good weather, can really get a LOT done with that in just a day.
I don't have to buy the thing outright, I don't have to insure it, I don't have to service it, I don't have to replace parts on it, I don't have to store it, I don't have to worry about someone stealing it, I don't have to worry about it depreciating, I don't have to feel like I "wasted" a pile of money letting it sit idle for months when no projects for it, I don't have to worry about people asking to borrow it, I don't have to worry about people asking me to do free work for them, I don't have to figure out how to get that monster to/from a shop for a major repair or service, etc.