Well, if you want to work with a budget, websites do offer "economy" armor. But, the 14th century was a time of many developments in armor and so the variety is quite large. You can go with splinted, if you want something not quite as heavy as plate, or go with soup-can. Mad Matt's Armory sells 14th century armor. Don't worry I know how you feel, I have no money and I too seek a 14th century kit. But, in this hobby, if you want good gear, you gonna have to have a bit of cash(which i wish i had). Winter steel class sells a CoP for a decent price.