You have to buy what you can afford - there's no point in people recommending you buy something you don't have the money for.
Having said that, given a fixed budget, you're basically trading off the things that influence cost:
- tractor size
- attachments (particularly FEL)
- HP
- transmission - 4WD, HST
- tractor age (new v's second hand) (although if you're planning on relying on 0% financing this is a bit different)
As you've noted, you're really looking at a larger HP machine that's bare bones in other ways - geared transmission, 2WD, no FEL, OR a lower HP 4WD FEL machine.
You say you're mostly looking at bush hogging, but as most are saying, if you had a tractor that did more you'd use it for more. With 8 acres you're going to bush hog maybe once a month in the warmer months...so maybe 8 times a year? Maybe a little more.
So....the real question here is size of the bush hog you can run. Can an L3901 drive a materially bigger bush hog than an L3301 or L2501? It's the same weight, so it won't lift a bigger implement, but the HP is important.
And then your tradeoff is maybe 20-30% longer bush hogging 8 times a year, v's the other jobs you might do. Other jobs might be:
- moving horse poo. I assume you do that 2-3 times a week, and you have to do it with a wheel barrow. Ugh
- moving hay. You probably do that a couple times a week minimum, and you're doing it by hand at the moment
- any random "move stuff" jobs. Once a week?
- anything that requires a wheelbarrow. Now you have a power wheelbarrow. Couple times a week?
So to really make it clear - your tradeoff is either:
Less time on your tractor (bigger bush hog), and then spend that time shovelling horse poo by hand, OR
More time on your tractor (smaller bush hog), but you no longer have to shovel horse poo by hand. Well, less hand shovelling.
I know what I'd do, but everyone has different things they like.
Of course, going to second hand might also be a great idea. An older tractor with 4wd and FEL, and probably with no emissions equipment, could be the right choice that lets you do both.