2!! that will be an experience. one six month old boxer is hard enough even when you have them from 8 weeks. i know that was the hardest age for Bo., and 2 pups that lived outside will be about 10 times harder to deal with, because they probably havent been socialized at all.
but if you do decide to 100% get both of them:
get a flea spray or powder and do your whole house before they get there, most of these last a couple months so it will keep killing any fleas that got missed on the dogs... you may want to get extra collars as they may want to chew them off each other. lots and lots of toys, not that it will mater since they will just want what the other one has

. good luck, you will be very busy
