If you want clients to book sessions on an automatic recurring basis, such as weekly, then this would be too difficult for me, as it would involve subscriptions combined with booking. But I can build for you a site where clients can book just one session at a time with PayPal. After they complete their session, they would need to go on the website and book a new session. Now, I will need you to provide 1 banner photo for the site - maybe a Photo of you and the choir singing. Basically, once I received that photo, I'd make a design in Adobe Illustrator of the home page. Once I got your approval for the design, I would use that one design as a guide to making more designs, and then the whole site. I could get the PayPal working with WordPress and WooCommerce. I would build the WordPress theme with the Genesis Theme Framework. Thank you for considering my bid.