T.F.
It is not a "play date" if you are being paid.
You would need to find out if your landlord would be ok with this set up as well as the HOA if you have one.
You would also need to check with your insurance agent as well because if you are a renter, your insurance is probably different than the insurance which is carried by the landlord on the house. Your landlord might have to have another type of insurance for liability purposes.
Lastly, I don't know guidelines in your area but you may need to be registered with your state in order to be doing this legally. You may need a specific LICENSE before becoming a day care provider.
I would suggest if you plan to do this that you take the proper steps in order to do it legally or it could end up costing you royally in the long run if you side step any "rules".
If someone is in trouble, even accidently and claims " I didn't know that" they are still responsible because they should have researched and known the facts. That excuse does not work in a court of law, IRS, etc.
Best wishes to you and I hope you get things set up the way you need it to be.