[Aeroherbs]

Advanced Nutrients isn't that expensive. It depends on where you are a bit but if you shop around you can get a good price.

Also, you can use AN with the Lucas formula if you want. They've got a Grow, Micro, and Bloom 3-part just like GH but it works better IMO. So you can totally use Advanced's GMB with the Lucas Formula if that's the way you wanna go.