Disadvantage in regards to what? By the time the person who levels normally hits 60 they'll be have acquired far beyond i70 gear and much much much more than 300k gil. And how will they always be behind? There is a cap to what you can achieve gear wise and it resets ever other major patch. Gil comes and goes depending on your nack for it. A 300k handout isn't going to last anyone long if they have no talent for managing gil and profit, that person leveling normally could easily outstrip the boosted player's fortune by millions.
