UChicago: Reach - If you have really good essays, I think you could get in.
UCLA: Low Reach
JHU: Low Reach
I’m not familiar enough with the other two schools to comment.
I actually think your ACT is weighing you down more than your GPA, which means you can improve your chances if you can get it up. Something else that could potentially raise red flags is the fact that almost all of your ECs are from junior/senior year, and they don’t seem to follow any sort of theme, which might make schools think that you are resume-padding.
Also, regarding the cost question: you can get financial aid to cover part of your costs if you can’t afford it. A lot of schools will have net price calculators (JHU’s is here: https://npc.collegeboard.org/student/app/jhu) to give you a general idea of how much you’ll actually have to pay.