HI
First off, sell the surplus wood for firewood - we pay a lord's ransom to buy ours.
Second, don't cut down all the deciduous trees - choose some nicely shaped ones to grow on, without the competition of the conifers. They will add amenity to the land, and your horsey folk will need a bit of shade for their pets
A good crop to give you a return in a few years would be......Christmas trees
. Well, you know they'll grow and you could still clear the land a couple of years before you sell it.
Unless you intend to keep horses yourself, don't bother building a stable - it's expensive and in 15 years will be totally outmoded, and the wrong size for the new owners. They will simply pull it down and build a new pony palace.
Who's to say also that horses will still be in fashion, or affordable, that far into the future. People might want to buy your land to grow veg on, or to plant houses on, or perhaps for Christmas trees
. So I suggest you keep it flexible.
If I was going to spend the next 15 years living on a piece of land, then I would make it just as
I want it, not to please some unknown person in the future. You never know, you might want to keep it as your own retirement home.
If it was me, I would turn it into a beautiful garden for flowers, trees, veg and wildlife. Funny, that's what I've done with my bit
oh and the odd
and
.