By alternating the two you are missing out on the synergystic effects that happen when both are taken at the same time.
If money is the concern I think you would be better off using the hgh at a low dose like 2ius ed in the am and then using the igf 4weeks on 4 weeks off, repeat.
I'd follow that ritual while on aas and then, if, when you come off discontinue the hgh and igf at the end of pct.