[CalvinC]

Increase an array each time the player buys an house

pawn Код:

pInfo[playerid][Houses] ++;

And in the top of your command, check if it's higher than 3, and stop the cmd.

pawn Код:

if(pInfo[playerid][Houses] > 3) return SendClientMessage(playerid, -1, "You already have 3 houses.");