Im creating a kind of SaaS for booking/appointment, so my customers can create and manage their own services, pricing, bookings white labeled. I attach a document explaining in details.
These are my options to achieve it in short time (as its an MVP, we want to launch as soon as possible, but with excellent user experience)
2) Buy a SaaS ecommerce from Codecanyon and make modifications to fit our solution
3) Build from scratch (using framework) by a developer who has done something similar before (and can reuse code or know how to achieve it easily)