From my limited knowledge of peptides CJC-1295 and GHRP-6 would be the way to go. I am noticing more benefit from these two than I did from synth hgh at 4iu/day.
You will want to use ghrp-6 at 100mcg, 2 or 3 X per day
& cjc-1295 w/o DAC at 100mcg once E3Days. cjc only looses about 10% effectiveness per day after the injection so at 3 days out you are still at 73% effective. GHRP only stays in your system for about 2 hours so it's a lot more high maintenance than cjc.
The answer to your last question is whatever is affordable to you. People usually say at least 3 months on or you won't notice much...