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?
Sara Douglass novels. Hades’ Daughter series (4 books) and the Wayfarer Redemption series (6 books). Those were probably the first series I collected.