Hello and welcome to EmpowHer,
I am so sorry that you find yourself in this situation and I would love to offer you some advice.
First of all I want to say that I will be giving my opinion based on limited information. So, you will benefit from getting several different opinions in addition to mine.
First I think it may be helpful for you to examine what you really what. Do you want him to stop cheating? Do you want to leave him? Do you want to stay with him? Do you want to transfer his care to another person?
Once you determine what you really want, you can pursue it completely. If its financial freedom, pursue that. If its a divorce, pursue that.
You must have your own needs met before you can help anyone else. This is especially important for you as a care giver. You may feel selfish for thinking of your own needs first, but don't. It isn't selfish, its necessary.
Do not feel obligated to sacrifice your own mental, or emotional wellbeing for a person who does not value it.
I understand this may be very complicated to put into practice. But I believe many answers will come to you once you know exactly what you want and start to pursue it.