I'm with DavidandCollette - sit back a bit and work out some idea of an overall plan before you start buying big equipment piecemeal.
You don't need anything right now. The grass isn't growing at this time of year and machinery on the land when it's wet wrecks the soil.
Horses on wet ground make a big mess and also churn up the soil, as do cattle and pigs. Sheep, goats, geese are much lighter on the land and give you something to eat after a while. The only reason I can see for keeping horses is
instead of a tractor, quad etc. You can still get equipment for horses to work the land and cart stuff around. They do take longer to get going in the morning, and to settle for bed though.
We have a Siromer small (not compact) tractor, which is great. We have a plough, rotavator, rake, back box, hedge trimmer, front loader and trailers for it - it has a pto which is so useful. They are cheap - in the region of 4K if you stick them together yourselves (just the bodywork). We were also given an old David Brown which we use mainly for mowing, turning and baling hay, pulling out the odd stump, but otherwise it's too big for our needs.
Oh and welcome to TAS City Boy
Congratulations for making the Great Escape