[Jefff]

Use house arrays for this, example

pawn Код:

stock GetFreeHouseID()
{
    for(new h = 0; h < MAX_HOUSES; h++)
    {
        if(HouseInfo[h][hID] == 0) // or if house is not owned
            return h;
    }
    return -1;
}

or load in OnGameModeInit all houses and set
HousesInGame = LoadedHouses;

and your free slot is HousesInGame

pawn Код:

HouseInfo[HousesInGame][hID] = HousesInGame;
rest house arrays
...
...
HousesInGame++;