Not revealing anything too secretive I suppose:
Glider cost powered as shown (lots of upgrades): $85k
DD12.7L Core Charge: $3500 additional if I don't return a donor engine to the dealer/factory
Components: under $10k additional invested
Cost of identically spec'd truck new (with DD EPA '10 Engine) including 12% FET: $154K
We expect we're saving around $50k or 33% total, but that's assuming we would have bought brand new in the first place (which we wouldn't). The glider came in with a number in the price range of "used" trucks we were looking at. There was no way in God's green Earth that I was going to pay $90k for a lower to mid mileage used EPA '07 tractor. For the same money, we have a factory warrantied rebuilt engine, a whole new cab, chassis, cooling, electrical, air and A/C system. Oh, and no urea tank.
I suspect we could have shaved $5k or better off of the glider just by choosing fewer options, such as interior upgrades, gauges, painted tanks, etc. We found though that the relatively small price of those features made a world of difference to us. The DD Core Charge applies if you're not turning in a DDEC 3 or better core. There is a penalty for DDEC 1 and DDEC 2 cores, but its around $500 to $750. The core doesn't have to run, just have to turn over freely.
There are a lot of rules to follow on cost, pricing, etc. The gotcha is that the total cost of the glider, including rebuilding of components, is factored in with everything you buy over a 6 month period. So, you can't defer certain component upgrades or new tires trying to avoid the IRS FET cap. I'm well below that number, but I'm donating my own labor and using decent components that we haven't had to completely rebuild from the ground up. I received labor quotes of around $12K to complete the glider using my supplied components.
Financing was available thru DTNA and GE Capital. Both had excellent rates. Down payment options ranged from $5K (plus supplied components) to $13K. Financing doesn't fund until the DMV inspection is complete and truck is ready to title.
We're going to reasonably detail the process and share it, mostly because we could find no real good information out there for others to consider. For us, this was easily the way to go.