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Do you think the the Kubota BX can really do all that. My concern is the pasture, not really the grass around the house. I would really like to have a BH and would add one down the road on the Kioti or the Mahindra. Can the BX really work on the box scrapper, bush hog etc...or is it a electronic wheelbarrow with a lightweight digging attactment? Not to flame BX owners, but once you buy, it would suck to keep thinking, I should have gone with more HP. </font>
Midwest makes some great box blades at modest prices. They make 3 versions, the 15 series for SUB-Compacts, the 20 series is Standard duty and the 30 series Heavy Duty. Many folks find the 15 series to be suitable for more small frame CUTs in addition to Sub-CUTs which will attest to their robust designs. I've seen my neighbor do some amazing things with his BX1500 and his 48" box blade on 4 acers of land, including grooming his gravel drive for 8 years, cutting drainage swales in hard clay soil, etc.
As for regretting the lack of HP a BX might offer, I'd point out that that most of the BX class of machine has more HP than either the Mahnidra 2015 or Kioti CK20. And if you are a real HP junkie who only needs a small tractor (like I am), then take a look at the New Holland TZ26, it is a Sub-CUT with a 26hp engine. But I honestly don't see that you need it.
As for cutting the pasture, my suggestion would be to rent a 48" rotary cutter, cut it down, then maintain it with your finish mower and it will actually turn into a lawn. By keeping it mowed, the weeds will die off and the natural prairie grasses will fill in. You could overseed it with turf grass if you felt you wanted to speed the process of creating the lawn. Most of my lawn is simply reclaimed prairie, I knocked it down and then maintained it with a finish mower. Works great.
Now I am NOT a fan of the little backhoes, but there are many folks here on TBN who love them. I personally don't think they are capable enough to justify the cost, mine sits unattached most of the time and I typically rent a BIG one when I need to get some real work done. But that disclaimer aside, there are lots of folks here who have done amazing things with small backhoes. A 30hp class tractor is going to have a backhoe sized at about 7' to 7.5', one of the smaller units might only get you a bh with 6.5' but it will still dig a good size hole, just a little bit slower.
Don't underestimate the small tractors, HP is more of an issue with the PTO powered implements than with most anything else. And also understand that there are many people who would maintain a 3 acre property with nothing more than a Sears garden tractor. So from that perspective, a Sub-CUT or a small frame CUT is going to be a huge leap up in capabilities. A 20hp diesel Sub-CUT or small frame CUT will easily pull a 25hp garden tractor around the yard as if nothing is attached to the rear of the machine. Don't confuse high HP gas engines with diesel torque provided by a modest size diesel.
I would also suggest one thing. Get a 60" Mid Mount Mower, you'll find it easy to learn how to use and just rent the rotary cutter for one day to knock down the 2 acres. You'll save a bunch of money by not buying the rotary cutter, and the MMM will easily maintain the pasture and turn it into yard quicker than you realize.