you can make butter from goats milk, its ust not as easy smply because the cream doesnt seperate as easy, you can either invest in a sperator (xpensive but if your a butter feind might be worth it) or be patient...gather your like as normal but let it sit in the back fo the fridge for a few days (takes at least 3 days for the cream to realy start to rise...then skim...
because it doesnt seperate easily your not going to get as much cram as you would froma cow, BUT the milk youll be left to drink will taste just as rich as fresh whole milk because of it...its only partially part skim.
save the cream into a ub in the freezer (just continue adding your cream) untill you have enough to make a deacent batch of butter.
look for a breed high in butterfat, nubians, nigerians, and their mixes tend to be the best if your looking to do butter because theyve got the highest fat content to the milk.
lamancah tend to do well too.
alpines togs and sannens have a lower butter fat content but tend to produce more milk.
given your climate and location though youd be perfect for nubians and nubian mixes who like dryer condiitions and do very well in the heat. nigies and nigie mixes would also work (there origionally from africa)
alpines togs and sannens are siss diary breeds so can be a little more sentiive to heat conditions.