A few years ago, I spent most of my savings on The Lunar Chronicles by Marissa Meyer (Cinder, Scarlet, Cress, Winter, and Stars Above; I didn’t get Fairest), read them all, and loved them…though I didn’t reread them and sold them some time later.
And what was the first series you spent most of your savings on?
Probably cherub or the edge chronicles (fantastic fantasy series with lovely omnibus editions for the 2nd/3rd trilogies) curse of the gloamgozer etc