Hello fellow dad!
The key here is to work on not feeling guilty about solo time. It’s not easy. But it’s necessary. You need to recharge and some solo run time is an excellent way of doing it. One method I use is to remind myself that by doing this for me it will aid my family because I will be in a better head space for them.
As important as this is you should also encourage your wife to get some solo time as well. She needs balance too.
Best of luck to you!