Comment Consider Contract to Perm (Score 2) 256
I think you should bring in contractors with 6 months right-to-hire. This way, if you like them, you can make them full time employees. If you don't like them, you can get rid of them with a phone call.
In case you are curious, I do contract work for the U.S. government. We work side by side with the government employees. I have been at the site for 1 1/2 years, and there are others at the site who have been there much longer.
The workgroup I manage is a mixture of contractors and sub-contractors. We usually bring the sub-contractors in with 6 months right-to-hire. This arrangement has worked out well for ramping up quickly. (Even so, it is hard to find good web programmers these days!)