Are you just interested in the lowest up front cost in dollars? I went to the US Military Academy. Tuition, room and board are free, you get a small stipend each month and you have a guaranteed job at graduation. You pay for school with 5 years of service as an Army officer. I was a Mechanical Engineering major, but they have a decent EECS department also. The military academies have an interesting setup where they are officially an engineering school, and everyone, even the history or law majors have to take an “engineering track”. The engineering majors also have more humanities courses than their peers at most schools.
I’d be interested in a comparison of your earnings over those five years of service compared to the median income for the first five years after graduating from public/private/Top-10 schools. I still think you’d be getting the best deal overall but the community college + state school route may seem more competitive in terms of cost after factoring in the relatively low pay of O1-O3s.