I agree with this. If @Jiggy-Z is willing to work for someone else, I can guarantee that a large GC that self-performs their concrete work would hire you in an instant and pay you well. That would be for estimating and/or PM work. I'm thinking of companies like Hensel-Phelps, DPR, Spaw-Glass, Austin Commercial. I know you've worked in this arena before and you may have some contacts already. This is in addition to big forming companies like United Forming, CapForm, and your bigger concrete companies like Ceco. Experienced people with your background are hard to find. You would be a great hire.
Best of luck and well wishes for you and your wife. I hope it all works out.
edit to add: You may think that working for another company might be a step backwards for your career. But you may like sliding into retirement working for someone else and not having to pay the bills, run HR, logistics, contracting, and all of the other 'stuff' you do when running your own business. You might find it to be so easy that you actually enjoy yourself.