Can I add appointments to a product?

[TechCowboys]

I am selling some technology products and have created a site using Square to advertise. I currently have my products displayed with pictures and prices. My question is since I will also be installing the products for shoppers, how can I add a feature so the customer can book an appointment for installation while they are checking out for the product? I was going to try to make them a "Service" so people could book appointments but it said the products won't be able to be added to my Square site? Also, is there an option for them to pay later (once product has been installed)?

Thanks for help! 

[JustinC]

@TechCowboys - I think the best solution is to do without the Online Store and set up a booking site with Square Appointments. 

Your customers can book a time for the installation within your booking site, then you can charge them after the service has been rendered through the Appointments app or convert the appt into an invoice from your Calendar so your customers can pay later.