Welcome to the forum blaze

Questions:

1. What training method is the most effective for me? (method that is most likely to put as much mass possible on a hardgainer)

At this point I would think anything with a planned progression would be bennificial. Using a pyramid like you mentioned isn't bad, I've seen some gains like that before, but it depends on your lifts, and what your doing for each muslce. Post up your full routine for the week and we'll take a look at it.

2. What nutritional tips do you have for a (short on $) student? (I can make a diet, no problem, just need affordable ingredients or other tips?)

The most affordable way to get good nutrition IMO will be utilize a bulk shopping store (here in the states there are places called Sams club, BJ's, Costco). If you can, if not, there are cheap protien sources like canned tuna, flank steak, lean ground beef. On the carbs side, bulk oats are cheap, as is whole grain bread, and pitas and such.

3. What affordable quality supplements can help put on mass for a hardgainer? The list of supplements i tried so far:
Weightgainer (MAMMOTH - ony w.g. i tried, didn't work for me)
Whey Protein (EAS 100% Whey Protein - like this one, very good product)
Creatine (Xpand - gives good pump, okay gains/ Revenge V3 - drinkable taste, modest gains/ S.A.N. Cubed - smells/tastes like glue. stopped using it.)

Whey protein - ON's (optimum nutrition) 100% whey
Carbs - bulk dextrose and malto dextrin (very cheap)
Creatine - Any bulk mono will do you good, I like Primaforce
Citruline Malate - again bulk powder is the way to go, primaforce is cheap

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