Are the trainees *ab initio* or do they have prior aviation experience? This is a big differentiator. Your post implies this is some kind of business aviation flight department currently operating airplanes and looking to add a helicopter asset.
If the trainees have commercial flying experience in FW and you are in fact a flight department in a situation such as I have described, my solution to this problem would be to acquire an R-44 and lease a Fly-It simulator. Do all possible training in the sim, do the rest of the training in the helicopter, and then utilize the 44 as an initial asset for your department.
Then if you still need a turbine aircraft, you could fairly easily sell/trade the 44 and acquire something along the lines of a 206.
Best of luck on the project.