Considering how much I expect he's paying for the NY apartment, it's very likely he could afford it. I hadn't thought about how his timing was but if you think about it, that's not much different from out other favorite couple (proposing BEFORE the secret anyone?)

CLARK: No. I'm just worried I'm a jinx.
JONATHAN: A jinx?
CLARK: Yeah. Let's face it, ever since she's known me, Lois's been kidnapped, frozen, pushed off buildings, almost stabbed, poisoned, buried alive and who knows what else, and it's all because of me.
-"Contact" (You're not her jinx, you're her blessing.)