Just did this scenario with Whispered last weekend, it's really a lot easier than people think. The drummer operated a macbook with logic and interface with atleast 4 outputs next to him (didn't really care to inspect which one, I think it was M-audio or something). He got a small Behringer mixer for inear monitoring, he took click directly to his inear from the interface and he got a monoinput from the FOH mixer that I operated. I got a stereotrack of all the backingtracks from interface and it worked splendidly.
Summa summarum: What you need is
- laptop and interface with 4 outputs
- 2 di-boxes and 3 TRS cables
- drummer with inear/headphone monitoring
- small mixer for drummers in ear monitoring
So with assumption that you have a laptop, quick cost calculation of the entry level package:
-
4 out interface: 1 x 150€ = 150€
-
TRS cable: 3 x 5€ = 15€
-
DI-box: 2 x 30€ = 60€
-
minimixer: 1 x 60€ = 60€
-
inears: 1 x 40€ = 40€
= 325€, and you americans can get the package even cheaper