Not including monitors, PC or HOTAS you could build a functional simpit starting @ $100 all the way up sky is the limit.
I personally have around $900-1200 in mine that is everything included...PC, Monitors, HOTAS, rudder pedals, track IR, TH2Go, 2 interface cards,switches, carseat from a junkyard and scrap wood...but I'm just getting started with my build ( I have been working on it for a while now
) but still have projects going as we speak err type. I am building my new throttle quad that houses the RPM flaps and tail hook levers as well as the 3 trim pots.
I need to spend alot more time in game to get my final switch layout as I'm new to prop planes.. this Pit has been changed alot started out as a Mech pit then became an F-16. After that I used it for a space sim called JumpGate. now Prop Planes and I love it so much the build will stay a ACES HIGH II PIT FOR EVER!
SEE my SIG below