I hope you will think this through very carefully and not let your heart rule your head.
First things first, how old are you?
Will it ruin your own health looking after him?
The carers will only be there for a very small part of the day.
Will you come to resent him if you never get out of the house, never see anyone?
Are you prepared for getting up in the night to attend to his needs?
You love him very much and want to carry out the vows you made.
Sometimes that is best done by letting others do their job and you spend quality time with him, visiting every day, taking him out for a walk, a coffee together, maybe lunch.
Please consider what is best for both of you, not just him.
Do not let me put you off if you are confident you can do all these things, but, think long term and not the immediate future,
My sincerest best wishes in your decision.