I've had goats here and there since I was a kid. Great critters, lots of personality. Not as bad tasting as lamb. When I was young we lost a beautiful nubian buck when his horns got stuck in the fence (field fence as I recall). Dad suspected some kids where shooting him with a pellet rifle or someone was shooting on the hill behind the pens and scared him into trying to get way. With 25 acres and open spaces (no tight chutes) that shouldn't be a problem for you.
I saw a weed control contractor using what looked to me like equine based portable electric fence products to get the goats to focus on select areas. Sounds like a learning curve item to me (part of the experiment).
The only other concern with horns are short kids around the goats. Unintentionally loosing an eye or other facial damage when handling the goats by the kids.
I know of some folks that put a llama in with them. The rejects are often used for this (even friendly llama's are apparently not too nice, so those not handled at all are very protective of there herd). Something to try if the donkeys don't work out. This time of year it ought to be easy to find wethers for next to nothing on craigslist (watch the sale barn auctions too).
As I understand it, there are 3 distinct preferences for goats, based on culture: hispanic, asian, middle-eastern. Different ages. The Muslim and Jewish require the same thing (albeit different faiths): a ministers blessing and ritual killing (I understand it is very similar). Just thoughts when researching your markets.