I can sympathize with you. I jut got accepted into graduate school, and the nightmare of scheduling and paying for everything has started all over again for me. You've got lots of good replies already, but I'll add a few points/emphases:
-Be very careful about which schools you're looking at. A lot of traditional 4 year schools, public and private, run mostly on young kids getting federally backed loans which can't be discharged through bankruptcy. That, among other things, edges the tuition higher. If large loans aren't an option for you, then these schools' entire pricing scheme will be off-kilter for you, and they may not have a lot of motivation to help you out unless you're willing to pay the sticker price.
That said, tuition costs vary radically from school to school, and program to program within the school (especially if you aren't going to be living on campus in student housing). Make sure you are looking at schools with respectable degree programs in the field of your interest, and then comparison shop. Look at more than just upfront tuition. You'll also likely want things such as job placement rates for graduates, research opportunities, and other things which are poorly captured by tuition listings. The worst thing you can do is to look only at schools that happen to be near where you already live (excepting public universities, which often offer in-state tuition deals to residents).
Also be on the lookout for schools that "bloat" their graduation standards with lots of general education requirements. If you only need 60 computer science credits for a comp sci degree, but your school requires you to take an additional 80 credits in non-comp sci classes you'll end up burning money and time on stuff you don't care about at that school. Unrelated classes can be great and mind-broadening, but it's also quite a luxury at modern prices.
-Check how the tuition is calculated. Some places have weird pricing schemes, but the most common display (from my own experience) is of the tuition rate for a student taking a full course load each semester. Sometimes other costs, like student housing are included, but this runs the other way as well. Often, things like lab fees aren't made clear until you've already signed up for a course unless you make a special effort to ask about them.
-Ask about scholarships and other assistance. You don't always have to rely on loans from banks to finance your education. Many schools, especially private schools, have great tuition assistance programs that are only discussed with applicants who ask about available assistance. This includes work-study programs, too.
-Get away from the "typical timeline". Most bachelor's-degree programs are designed for four-year courses of full-time study (even though at a lot of schools average graduation times are closer to 5 or 6 years of schooling). That may not work for you because of cost, time, or any number of other reasons. But there's no particular reason that you can't plan on a 6 year graduation schedule, taking a lighter (and therefore cheaper) course load while allowing yourself time to work so that you can pay for it. It can also pay off in making sure that you have enough time to dedicate to your studies. With a bachelor's degree, your GPA might matter a lot, and your independent work (usually internships and shared authorships at the undergrad level) is crucially important.
-Ask about transferring credits. You've mentioned that you have several certifications. Some of these might be accepted for credit (sometimes only half credit, but every bit helps) at the schools you are looking at. When this is the case, it automatically saves you money on tuition and time on earning the degree. You should watch out for schools that accept certifications as "pass only" credit (you get credit for the course, but your transcript marks you down as having a non-letter passing grade), not because that's a huge issue, but because you don't want to be surprised by it later if it doesn't suit your plans.
-Finally, consider moving outside the US for school. The US is uncommonly expensive for post-secondary education by a wide margin, but aside from the mega-reputation schools (Harvard, Yale, etc.) the schools aren't any "better" (in terms of education received or name-brand-cachet) than many schools in other countries. You can save big over US schools just by driving to Canada or a nice South American school. Getting a student visa might be irritating, but I doubt it would be worse than asking banks for loans.