can you send more than one a day or is it supposed to be for the entire day?

Rover cards are sent once per day for day care and some sitters start the event when the pup arrives and end the event when the dog leaves for the day but that's up to you how you manage it. Lots of sitters don't want the card running all day and killing your battery, so some start and stop it sometime during the visit. And some sitters never use the cards as it can be confusing for day care clients. If you wish to send updates during the day just send the client a text with a cute picture.

With recurring bookings the client is charged on Monday for the week and you are paid the following Tuesday. If I were you I would not have your client setup the booking as recurring as this mandates use of the card and can be difficult to manage if the client wants to change dates during the week.