I don't know if it matters but I am 5'8", 215 lbs with size 13 shoes. And 79 years old. Oh well... Ha !
400 acres of hilly Ozark land is a tough assignment for a
L4701 all by itself. I used a JD 4700 very similar in size and HP to that for about 10 years. You will be good to go with a 6ft hog, med size grapple, and whatever you need to move hay around. Don't know that you want to tackle huge round bales with it but maybe ... I have 3 smaller
B2150 4cyl Kubotas (2 stick and one HST.) The Kubota engines are very reliable as you know. Of course you want a loader and I like the Kubota loaders which look stronger to me than their specs would indicate compared to other brands.
My larger tractor is a MF 2660 81hp and all I own are stick except for the one
B2150 HST.
For "near the house" lots and much loader work the HST is a better suited tool if that is a real high % of your work but I favor a gear trans rather than HST for most farming, esp bush hogging and heavy work. The HST wastes some of your HP for one thing and I like the control I get with a stick on steep ground. It gets to be a personal preference thing.
Does "hilly" mean that you operate on pretty steep ground a lot, especially when bush hogging? Probably so. [45% slopes are routine but not threatening and much above 50% to near 60% is "stay off of it" for me. Not that I haven't done some crazy things, but I have lost too many friends to tractor rollovers. In my opinion you need to get those rear tires out much further apart than Kubota allows/makes any provision for. I recommend 6" spacers for both sides if you intend to work steep ground at all with the
L4701. It is a stout and "over achiever" of a tractor which I think you will love but somebody in Japan thinks we all live on flat land. I have friends using an
M6040 (cab) and an
L3400 (open station) and they put 6" spacers on both those tractors which makes them much more comfortable on ordinary steep ground without getting heroic. They had the spacers put on by their dealer. I use 6" spacers on one of my
B2150's (installed myself about half the price of the dealer) and it makes a HUGE difference in hilly areas. I can go horiz around 45% slopes very comfortably and safely that way which I could NOT without the spacers.
Good luck with your gathering info. Should be lots of it...