[Konstantinos]

In OnGameModeInit callback, you should load the houses. Use a global variable and reset it before you load the houses. After you're done with the loading, assign the value of the last houseid + 1 to that variable.

pawn Код:

// At some callback
{
    LoadedHouses = 0;
    
    for(new h = 0; h < MAX_HOUSES; h++)
    {
        // loading...
        if( .. id does not exist .. )
        {
            LoadedHouses = h + 1;
            break;
        }
    }
    return 1;
}

Then you can simply do

pawn Код:

new RandomHouseID = random(LoadedHouses);