I'm just not so sure you should be the one to do this job. An insured expert would be better in my mind. Anything can happen when you're messing around with these walls. That's a big old heavy house, and if you undermine things, you could have more damage than you can shake a backhoe at.
Having said that, I think you could probably do the job with a 71/2 or 81/2' backhoe. I'm not sure how far down you're going to have to dig, but backhoes work the best when they're not at the full length, and in the curling phase they are strongest. If you have to go really deep, in rocks, you're going to start to lose power for digging in the extended position.
I like the idea of a rented or bought used trac hoe. Better reach, stronger hydraulics, and probably a better digger than any CUT backhoe. For all your other jobs a CUT BH should be just great, but I'm just not sure here, because there are too many variables I'm not privy to. Pics are not always worth the extra 1000 words needed.
John
Having said that, I think you could probably do the job with a 71/2 or 81/2' backhoe. I'm not sure how far down you're going to have to dig, but backhoes work the best when they're not at the full length, and in the curling phase they are strongest. If you have to go really deep, in rocks, you're going to start to lose power for digging in the extended position.
I like the idea of a rented or bought used trac hoe. Better reach, stronger hydraulics, and probably a better digger than any CUT backhoe. For all your other jobs a CUT BH should be just great, but I'm just not sure here, because there are too many variables I'm not privy to. Pics are not always worth the extra 1000 words needed.
John