Don't buy 3 in a box Primo from Schering. Its as fake as my mate's suntan. Buy single Spanish Primo in Thailand.
You'll make savings but its not near as good as you think. Bets place to buy is in the smaller towns. They make alot of money selling AAS and they'll happily order it in for you if you pay in advance. Nandrolone, Primo, Var, Dianabol, and Test at least
Also, I actually like your idea of taking an injection of Primo a week and do some "Hotel Room training" 3 times a week where you do lots og bench dips on the bed, push ups, speed squats etc