ok, so like a 30hp tractor / bubshhog is the way to go it sounds like.
what is the best tractor for a 1800 lb heavy duty bush hog attachment?
Your two posts indicate your tractor experience is limited. That is OK, we are here to help.
The Deere 420 was last produced in 1958. With a Backhoe, it would be too heavy to operate on turf grass. I doubt 1958 backhoes are easy on/off.
Contemporary 30-horsepower tractors weigh 1,800 - 3,300 pounds. An 1,800 pound Rotary Cutter is too heavy for any tractor in this weight range.
A contemporary 30-horsepower tractor can handle a 60" wide standard duty Rotary Cutter, which weigh 600 pounds and will max cut 1-1/4" diameter brush and saplings. In my experience this is ample. For larger stuff, use a saw.
What are the tasks you wish to accomplish with the tractor?
What is your soil? Will you be operating only on flat land or are hills a consideration?
What are your requirements for a Backhoe, in particular? For limited digging a clamp on FEL Bucket Spade may suffice, leaving the three point hitch open for implements.
What is your budget? A new 30-horsepower tractor/loader (1,800 pounds) WITHOUT Backhoe is $17,000 with tax.
There is nothing wrong with a used, well maintained tractor with an industry standard three point hitch.
