Sign a blank check & forward it to an excavator with a dozer... LOL
My property was an abandonded farm that wasn't worked for probably 50 years.
A thorny, multiflora rose infested, thicket or jungle would be an understatement.
You don't want to hear this, but all my ATV paths, open grassy areas, stand sites, etc - done by hand.
Cut trees & left stumps cut off as flush to the ground as possible.
Piled brush & either left as-is or burned in winter.
All 1.5 miles of ATV paths are mowed by hand.
Sure, been at it for 7 years, but anything short of a magic wand requires either money or sweat.
A good chainsaw, HD weedwhacker with a blade, leather gloves & plenty of cool drinks.
This is where a large family with 2-3 teenage sons comes in handy.