You seem like you have a little extra money these days.
You're in good shape financially, aren't you?
この場合の「景気」は、次のような言い方ができますよ。
ーYou seem like you have a little extra money these days.
「最近ちょっと余分なお金があるみたいだね」=「景気が良さそうだね」
ーYou're in good shape financially, aren't you?
「経済的に状態が良いようですね?」=「景気が良さそうだね」
ご参考まで!