If we even take an idea like this into consideration - I'd rather make it like: you pay your amount of money (5-10 €) get a full VIP, but for a limited time period, let's say 1-3 months, or something in that direction. This needs some time to analyze if that will work out, how many players will want to and will be able to do it, how much should it cost and for how long should it last, gotta see if there's a need for such option.