Just thinking outside the normal options, you could try to apply for PhD programs.

They typically pay doctoral students, albeit not very much (~$30-40k), which could lessen the financial burden. With a little creativity in your application, you could certainly write a convincing case for why 8 years of software engineering is superior to an undergraduate degree.

Also, I would very strongly encourage you to take one or more intro classes on the side before you jump in full time. It’s critical that you don’t delude yourself about what you’re actually getting into before you fully commit.