think of it this way....
relative to the initial cost, 1p -->10p is a bigger jump than 10p -->40p.
i personally stay @ hut level on every realm....so i can make sure that, even if i abandon a realm for 2-3 years, my precious near-entrance-real estate wont get lost. ♥
edit: after doing some research it seems that you are correct! i also found out about the badass command /payrent. im such a noob
