well this is an almost impossible question to answer, as we have NO idea on what he already has?
and with no real budget, the best advice is maybe what was given in the first reply
try giving your TIME to him.
help him maybe finish up a project or two without him having to ask you for the help
stick about for a weekend when he's busy

as for going hunting with him, that I think can be both great and BAD, and I say it like that due to, if you have ZERO interest in hunting and he's a BIG time hunter, all your going to maybe do is get his hopes up that your FINALLY interested in learning, when in fact your NOT, thus the bad side of it!

Maybe wake up early and wash and wax his truck(if he has one) or detail it as a surprise! might be a good idea as well! shows you invested time and helped him take care of something he uses and can ONLY help make it last longer!