1. i think i have 3 full suits. but i have a total of 8 jackets/blazers ranging from wool, cotton, linen, and cords. also have about 5 separate suit/dress pants
2. a pair (don't have any 3pc suits) usually runs about $500. jackets are anywhere from $150 - $350. pants range from $75 - $200.
3. two suits are from BR and one is from Express. the rest, whether jackets or pants, are either from the same places or like CK or JCrew
4. yes
i've gotten about 90% of said items custom tailored, costing no more than $25 (avg of $12-15) from things ranging from shortening pants, slimming a jacket to shortening sleeves. i advise people to get things tailored no matter how small the job
i'm going to assume you know the other basics of getting sized, but if not i can provide further assistance
is there a particular color you're looking to get? what kind of suits do you have now? adding variety is always cool