Brother, don't do it. Fire up LinkedIn and get a tech job as a data scientist. Stay out of San Francisco, LA, Seattle, DC, and NYC. Make money, buy a house, start your own business, achieve 9 figure wealth. Academia is no place for a talented and ambitious young man.
Honestly, I hate to say it, but I agree with this. Unless you can break the top 10, I really don't see the value in killing yourself for a phd in a super weak and declining academic market with everything stacked against you. You can find research-type jobs elsewhere.
Get a job, save, and start your own thing later if you want.