Given the financial situation and high stats for your kids, here are some suggestions:
Twin applications are generally considered together by admissions. Typically they’ll both be accepted or both rejected. Moreso in your case because your kids have similar stats.
Have a solid plan in place for ED. Also consider ED2 schools. The choices of Chicago and Vanderbilt are both solid. An ED application boosts chances by at least 50%. A nonbinding EA doesn’t change the odds that much.
Rutgers is a great fallback option. Its a large school, but plenty of opportunities in the CS/Tech area.