[Gammix]

Use IsPlayerInRangeOfPoint in the callback.
WIKI: https://sampwiki.blast.hk/wiki/IsPlayerInRangeOfPoint

Example:

pawn Код:

if(IsPlayerInRangeOfPoint(playerid, 1.0, HouseInfo[i][x], HouseInfo[i][y], HouseInfo[i][z]))
{
    //your code, this will run if the player is in range of the pickup
}

Set your range accordingly, 1.0 is appropriate though.
Also those x,y,z arrays are custom as you havent provided any code relative to those arrays.