Cheap second hand base for PC i5 + 8gb ram + mobo and cpu cooler $160 * safe money and get similar performance
https://www.ebay.com/itm/Intel-i5-4570-with-ASUS-motherboard-and-8GB-RAM/222819494863?hash=item33e113abcf:g:34IAAOSwZ11acyjf
GPU: 1050TI or 1060 6GB /GTX 970 on Ebay
PSU: Corsair...