Pretty straight forward Bodge.. take an old freewheel bike, I got a hold of a 5 speed ,

re tension the spokes , to takeout the Dish, add a 1 speed freewheel
and line it up with the 1 chainring you will use Up front.

I think I spent under $50, because I needed a seatpost as well as the freewheel.

Mine started out as a boat anchor Schwinn Mesa Runner.