I can only get 91% near me, I literally called everywhere, including all the medical supply stores. The 91% I get from walmart most of the time its cheapest, but sometimes other grocery stores. I usually have to look hard cus they will only have one spot for it, with like 2 bottles, and 8 spots for the 70% crap. I've tried 91 and 99 in the past and they both work just fine, 99 just evaps faster. Or really even better then Iso man is go down to the liquer store and get a bottle of the 95% everclear!! I liked my everclear run alot, its just not as cost effective to just evaporate drinking alcohol.
As far as enough to mess with, fck it man that run I did for the tutorial was the first bud run and I only used 10g. I'm sure you've got 10g of that shoreline laying around....... I got 1g of some killer oil, and another .6 of some ok oil from it. Hell call walmart right now they are 24 hrs, and make them go look for it so you can buy it tomorrow. I want results Beech not excuses!! It takes less then 5 minutes to do the setup, the wash, and the clean up, then you are just waiting for it to filter, and waiting for it to evap. I know you have a desk fan laying around just put a AC filter over the dish and blow the fan over it. I wanna see oil pictures by monday!!