Well it certainly is enough for me. Mine is rated at "four tons", and you can get a " "six ton" model that also just plugs into 100 110 V outlet And I only paid $200 and something for mine.
All true, but unless your cutting really small wood, that's not going to do it. Mine is rated at 22 tons, and I wouldn't want anything less. Don't need more but certainly not less. Also, really hard to trail extensions cords 500 yards out into the woods.
To the OP. I'm going to address 3 issues. Log splitter, tractor size and type, and wood cutting in particular.
Log Splitter: First of all, they don't run off the PTO. A stand alone has a gas motor that powers a hydro pump, which powers the splitter. The hydro pump determines size, not HP. On a SCUT, there is not enough GPMs flowing to a remote to really power a decent splitter, so a stand alone is really the only choice. My 35HP tractor is barely big enough for a splitter, so I went with a stand alone. Yes it will sit most of the year, but I split 16 facecords a year, so I need it. If you can't justify a stand alone, consider renting one each year, especially if you only do small time wood.
Splitting the wood is a major chore. I spent a straight week this may (40 hours) splitting my wood. This was after a month or so of cutting and hauling. It made a heck of a mess, a lot of noise, and takes up a lot of room. If you have a small yard, which you want to look good, splitting will ruin it pretty quick. To handle your own wood is a major commitment, easily justified in my opinion, but I have the time and space and lack of zoning to handle it.
On the tractor. I think you're on the right track. SCUT, MMM, loader, turfs (anything else can and will tear the lawn up). HST is the no brainer, There is absolutely no reason to get a manual tranny on a SCUT, and a lot of disadvantages. I assume the wood will come cut to length, otherwise you're going to need a much bigger loader and tractor to handle full sized logs. Also, even with a light SCUT and R3s, there will be times when it will damage the lawn, especially when wet.
Brand- A lot to chose from. Contrary to what some here are trying to tell you, Kubota is not the only quality maker of SCUTs. Definitely consider them, but there are other options. JD, Kioti, MF, TYM, LS, NH, Mahindra, and others are all good too. 15% off MSRP is a good deal. Expect to pay 14 to 18 thousand for a SCUT with FEL and MMM. A stand alone splitter should be between $1000 and $1500.
Hope this helps.