Isn't the reason the rent is higher because you can forego a car? For example, the average monthly car payment for a used car is supposedly $526[0] and insurance $168[1]. So if you get rid of that, you can afford nearly $700 more per month in rent (assuming you can still qualify by having household monthly gross income of 3x the rent).
So, in your case, you only really need to make more to afford a walkable lifecycle if you still want to own a car and have the option to use it to drive to places outside of your walking distance. Of course, completely moving to a lifestyle where all travel is public trasit and airport-based is tough to achieve, but it could be a worthwhile price to pay depending on how often you travel and where (since the time investment is also high for cars in the U.S. with how far apart each city is from the next).
So, in your case, you only really need to make more to afford a walkable lifecycle if you still want to own a car and have the option to use it to drive to places outside of your walking distance. Of course, completely moving to a lifestyle where all travel is public trasit and airport-based is tough to achieve, but it could be a worthwhile price to pay depending on how often you travel and where (since the time investment is also high for cars in the U.S. with how far apart each city is from the next).
0: https://www.bankrate.com/loans/auto-loans/average-monthly-ca...
1: https://www.bankrate.com/insurance/car/average-cost-of-car-i...