If you're trying to build on a budget there are a ton of in-spec lowers that aren't at Noveske prices.
Upper:
BCM Demo Upper - $90 (seen many of them, and if you're building a workhorse the "scratches" will be a non-issue)
BCM FA and Ejection Port Covers - $26
BCM KMR Alpha 13 - $190
Daniel Defense 16" barrel - $250
Adams Low Pro Gas block/roll pin/gas tube - $40
BCM BCG: $170
Lower:
Seeking Forged Lower - $90
BCM Lower Parts Kit - $100
VLTOR A5 RE Kit - $95
Stock of your choice - $50
I hit $1101 on that build and while you could trim money on some things, I wouldn't.

