I think it would be grat to create a stand-by mode for players. It could be activated from 2 days to 1 month and a half periods. It will give the player a password with a lengh depending on how long it is going to be activated this mode. Then this player could not get into the game during the period he marked without a HPD payment, also proportional to this marked time. Other players will know how long this player is going to be inactive and could use its gateway as if anything happens with it, but when the period finishes and the player comes he will be promted to introduce the password. If he makes any mistake or he can not remind it, he will take the penality of get the gateway as the other players could left it.
Also it could be possible to get downgraded the level of the software the player got running into the gateway for the standby period.
I know, it will have to be mid-hardcoded, but I have an idea around how to decrease the data storaged for this function.
@siremi: If you are interested on this idea it contact me via PM for giving you the idea I have for the code.
Thats all.