better off selling your guns, see what you get moneys wise and then start building up the carp tackle..
alot of lads use top quality gear like shimano, fox etc which seems to hold its price.
id imagine, for a whole set up, rods,reels, nets, end tackle, nets, mats, bivvy, chair etc.... you would be looking at £500 at the very least..
start small, then build up mate