A sub frame for my 2810 HST cost less than $500.00 and that included the shipping, I don't think I would feel comfortable working my hoe like I do if It where hung on my 3PT. If anything between the hoe and the tractor failed, or if you lost a pin, that 1,000 pound hoe would fold into that 3,000 pound tractor with you right in the middle.
I have been stuck to the point I had to turn the tractor around 180 degrees with the hoe. I wouldn't what to try that with a 3PT setup.
Dave in NH