for that kind of money, I would get yourself the RRA whihc would be a good factory rifle. hell I would I would be willing to help you build one from a receiver for a lot cheaper so you could get more accessories or ammo or mags instead...

But for that kind of cash, if it were me...I would buy 2 del-ton kits with lower recievers. You don't need the optics now. what you need are the lowers/full rifles. get them built and get them built fast. after that there is always ammo, these is always optics, there is always mags. mags may be expensive later but they will be much cheaper than a full rifle. the optics won't go up much in price because they won't be banned.

let me know if you need help.