If this was combined with simvibe and the Oculus Rift and could be run with all the PC gear swinging about in there with you on a large battery it might be a ton of fun!
However, the Rift would need the positional info from the rig and take account of the position to work right. Im not sure how you possibly get realisitc instantaneous force going, you have to wait to be rotated into position to feel the gravitational loading in your harness and never experiencing the real feeling of flight which is that sudden lack of any gravity making your guts complain. Or yaw. I imagine its very easy to get motion sick if the initial impulses are at odd angular acclerations to what it looks like you should be experiencing in the sim (before you start to hang in the right position).
But all technicalities achieved and all ambitions of accurate forces abandoned it would be one hell of a ride!
30p a go, record for the day 3 minutes before vomiting.
(A comparison to glider or powered flight lessons costs might be in order also)
Realistically I think the Rift alone is the way forward for me. Just note how powerful is the effect of stepping onto a stationary escalator you sort of suspect should be moving somewhere deep down, the weird and powerful vertigo you can feel, and also sitting in a train at a standstill as the train beside you pulls away; you really feel like you are accelerating backwards...