drove past a yard sale, hopped out, and got two old cheap monitors and a spare old mouse and keyboard for $30 didn't haggle since the guy had kids.

while unloading my car I found a spare 700W power supply that my sister gave me that I completely forgot I had.

https://pcpartpicker.com/list/vtqtfd

I think what I'm going to do is buy some expensive high quality DDR4 ram to replace the stuff in my actual main build and take out my DDR4-2400 CL17 Memory from my main rig to put in the budget box. Now I just need a cheap heatsink (I have like a dozen old 140mm fans lying around) and I am good to go with the PC!