I get your points on money and storage space and 1080p being available,, but damn, 1440p. That's like 10 years ago.
Say more about your setup, and if you really need 1440p, I'm sure someone can say the steps on how to downres a 4k download to 1440p to save space.
I'd recommend upgrading though. Unless you're disabled and there's no way to get a few hundred bucks together for a much better experience. Get a used Quest 3 (Don't waste your time on 3S) somewhere around $300