Can I perhaps assume this is an adult not a child daycare ?
There are tons of regulations in either. Also insurance of a home based business so you will have to get riders on your insurance plus liability insurance in case someone gets hurt on your property, ( home owners does not cover business liablity at your home)
Also you will have to see if city zoning allows a part time business in your home and you will have to get city permit or licence and perhaps a county licence also.
If you are doing adult day care most likely medicare ( your state agency) will have to inspect and licnec you as well.
Now this does not mean tha 100's don't do this illegally with no licnece or no insurance but it only takes one accident to make you lose everything.
Start by contacting your state medicare office
Your city business licnece office
Your city zoning commission
Your county licencing office
And your insurance agent.
Not what you wanted to hear I know,