Unfortunately, because you stated you were cash poor, my real answer for anyone else is to buy a 50 BMG, even if just an action of some sort. It looks rather inevitable at the moment that a Commiecrat will be POTUS and will have a Dem Congress. You can kiss the 50's goodbye, and the media hit pieces that have run about them (50 cals) in the past, will turn into a constant stream of hit pieces crying about 'no legitimate reason to shoot @ something farther than than 400 yards away' , the 50 cals turning criminals into killing machines able to destroy police Depts. with a single shot, they are guns military snipers used, etc., etc,. Of course the spineless RINOs will go along with them, and it will be a "beautiful sign of bipartisan ship @ its best" to the media.
For you, I would venture something foreign made, as these would probably get a lot harder after the Commiecrats reinstitute the AWB next year. What form it will take is hard to predict , but you can bet that they will target foreign stuff first, as it will be politically the easiest. So probably some sort of AK, SKS, or the CZ rifle.