So I've never technically owned goats but I'm familiar with them...if OP wants to raise them himself after they're done clearing his land he will need to fix that fence and pay for feed, water etc
Our wild goats do a great job clearing land but once the job's done unless you have a Filipino population that will take them (we do) they're worthless unless you like eating goat (I don't particularly).
if you want more valuable animals there are milking goats like Nigerian dwarf which is popular around here, although they're less hardy and won't eat back the bush as fast as some other breeds. There are also goats you can raise for their fiber but again- not as good weedwackers.
I suggest OP put on some gloves and do it himself