ok guys, i know nothing about ar builds. my nephews are big into it and make their own complete lowers from scratch. they however live 3 hours away and are always busy. and they also spend more than i would want on their builds. so i bought a pink lower from the group buy to build for my youngest daughter (8, will be a 9th bday present) i need to keep this on somewhat of a budget. lets say $800 max. what should i get, and where should i get it, and is it even possible to have that kind of budget? (not including optics. i have that part already) and lets say i wanted to build 2 of them, hopefully there are deals for multi?