Like you I want one, but after finding out what is involved and the cost of doing it I am out of that hunt for now. Still be really cool. Anyway a local gunshop here in Lafayette, Applied Ballistics, sells suppressors cause it is in indoor range, they have em in stock. Here is the what they told me for a 9mm class suppressor. 200.00 Fed stamp and a 6 month wait for the paperwork to clear BATF, even if I bought one that was in their display case. Oh by the way the cheapest 9mm class suppressor I could find started at around 450.00 and they go up from there. Then there is the threading and the cutting of the barrel. Something I would probably farm out due to the threading part. So add another 50 to 100 depending.
If I did buy one of their in stock ones while I was waiting for the paper work to clear I could use it at their range, but they had to retain possession of it once I left the range until the paperwork came back. Then I could keep it on my firearm and walk out with it. Even if you started now you will not probably have one for this years hunting season. The last item if I recall correctly was there is a 5 dollar transfer fee and it must be registered transfer, if you sold the stamp/suppressor to another person. no private sales...
I would find out more by just going or calling a gunshop that sells them. Applied Ballistics and Down by the Tracks Gunshop in Galveston are the two in my area that carry suppressors and would be able to tell exactly what is involved. I am sure they have web sites up or just visit the frienldy BATF gov site and try and decipher thier arcane instructions.