Stroke with only Pistons and Crank?
Cost is dependent on the parts you use and brands you are loyal to.
Ex. Rings range $25-$180+
Bearings $180 bucks for h series/narrow or king bearings are cheaper.
Pistons $380-$700+
Cranks $300-$1050
One could spend around 800 for a crank and pistons and cost after that for the remaining parts is the same as a rebuild roughly. You're gonna balance it anyways, bore it, the rings n bearings etc.
Kits are how much? 1600-2200?