5 man is 100 x 150 xball is 125 x 150 7man is 100 x 180. for fields i would say, go with the pmi fields, good quality bunkers. DO NOT GET THE CHEAP ONES FOR A COUPLE HUNDRED DOLLARS!! they will not last. or try to buy a used airball field. if cost of the bunkers are a issue, you can always start with hyperball, meaning 55 gallon barrels, get ply wood, cut them into shapes of airball bunkers, such as a triangle for dorito, or shape them like temples. you can buy osb (particle board) for pretty cheap. just a thought!
for field layout help, i would suggest you go to www.supairball.com
and go to field layouts. that shows all the nppl, psp event setups. hope this helps