A used excavator for that price will do a better job than a backhoe for most of the tasks you mention. The only advantage to a backhoe is more portability getting out to the back 40. Yes you may pick up a few jobs but where I live it seems everyone has an excavating business so jobs are few and far between. I didn't get a BH when I bought my first tractor and within a few years saw the error of my ways and went lookng for one for my tractor. Price is much higher after the fact than at first purchase. Ended up finding that an excavator made more sense to me. I will concur though that you NEED one or the other. You only live once.