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?
I will sheepishly admit that it was The Mission Earth series by L. Ron Hubbard. Note that I bought all them second hand, but still… It was ok overall I guess, took a few years to get through all of them as I wouldn’t read one right after the other.