I have found some odd gems from some makers in china that produce rather powerful NUC for half the price as Apple's mac mini 2018 line up.
However I got no idea if these are Hackintosh friendly.
Type one box:
SKEYLAKE based , i7 6785r, 65W, IRIS pro 580, DDR3 (max 16g), AC3165 Lan card
Type Two...