+1 on post 2. There are a lot of 3 point hoes for sale out there but you really need a subframe becuse the hoe can put enough stress on the transmission/differential castings to break them, especially on a small frame tractor. I even run a subframe on my large frame Kubota 105X just because of the stress factor and that eliminates all the wannabe backhoes and leaves Wallenstein, Woods and Bradco. None of the others offer specific subframes and you play Russian Roulette without one.
Crack the back housing and your tractor is basically junk.
You can get'em cheap (backhoes on Flea-Bay and elsewhere) but the collaterial damage can be devistating with no subframe.