im 18 and just want to gain some weight..like 20 lbs..so should i go with the bowflex??if i go with what your saying how much will it be around and how can i do it so i dont need a spotter???also what can i take to help me gain 20lbs..i just started eating my 6 to 7 meals a day but what sups can i take i have a very high matabalism..thankx