Pick an affordable school with generous NMF award.
The NMF scholarships are only available right out of high school.
Otherwise they might take a gap year until the financial situation is better.
Most schools will have a payment plan. Not sure, but it sounds like you might qualify for the AOTC.
How much would the cost be at UTDallas for the twin with AES?
If they take their $5,500 loan and work this summer, would you be able to pay the difference?
If the rental income isn’t that high, could you maybe sell that house?