I'm sorry. I have to say this, okay? HIM suck it up? Why don't you suck it up and get a job? That sounds meaner in type than it should. But I'm serious. Why aren't you out there working? If you had left out the part about him having to suck it up your question would have come off much more caring and not sounding so much like "I wanna stay home and he just has to suck it up and keep working 55-60 hours per week to support my lifestyle". That's how it comes across, I'm sure that's not how you meant it, okay? but it sounds like that.
Now, to answer the question.
If my husband HAD to work 55-60 hours per week to support our "lifestyle" there is absolutely no way I'd not be out working my butt off so he could work just 40 hours per week at most.
Many of my friends stopped their careers when they had children so they could stay at home with them. But when they started school so did the mom or she went back to work part time either doing something at home like making items for Etsy or craft shows, but bringing in some money to help. The ones that had kids on their way to college started college themselves or got higher degrees then went to work.
So they could save money for their kids college costs.
In my opinion you are the perfect person to be working in a good paying job and putting your income into savings so that any college costs that scholarships won't cover is paid for.
Why are you staying at home with high school age kids when your husband is out working 55-60 hours per week? He's working way too much and it's your job to lighten that load.
ETA
I assume he has a degree, most people that work in good paying jobs have college behind them.
Why can't he take a few core classes in physical education to get a second degree, or go straight for a Master's degree in Physical Education, and go to work in the education arena. With JUST a Master's degree he can work full time and gain tenure at a Jr. College. Good money and good benefits. Relaxed atmosphere, students who really want to be there, and always having time off on breaks so he can be a dad for a change and enjoy his family and his life.
Our local Jr. College has a phenomenal sports department and several of the basketball players have been accepted into 4 year universities on full scholarships and play beyond that level. The baseball kids are also sought after and these coaches/professors are always sought after at the universities that want their kids.
I know several jr. college coaches that have only master's degrees that have gone on to coaching jobs at university levels. They didn't have the full status and pay/benefits until they got their Ph.D but they did make more money and have a good job.
There is nothing wrong with him doing something he enjoys in life but it just might be that you have to go to work too.