I got a price of about $1,600 to get my entire machine blasted and etch primed. This is chain case, chassis, cage, arms. That was an approx number though as they don't know how tough the paint will be. They quoted about 200/hr and estimated 8 hours but rust depth and paint layers are the biggest factor. It has been over a year since i got the quote so i have no idea on the exact figures now, those numbers are from memory.
I ended up doing it all myself, about $200 in ilminite (black sand) and a home made blaster running off a $1,800 compressor. It would have been cheaper to get it done professionally but you can do small items at your leisure too like axle hubs, grills, wheel rims!. When i have finished i can sell it all for more than i paid. So in the long run I'm better off, i LOVE my 175 CFM compressor, I'm running about an 8mm blasting nozzle and it sure cuts the rust and paint till it wears then i just make a new one.
Paint, my 743 used about $200 - 300 in two pack paint, gave an amazing finish. Its nasty stuff to spray but the results are worth it. Wear a mask when spraying that evil stuff though! Its has the worst smell and the chemicals really aren't so good for your health....