possum. Hi, we have checked the website you mentioned, it's a very well built combination of multiple saas services in one package. It will take about 2-3 month to build a product with similar features. There is CRM, Social media management, Calendar, Payment Management, text and email campaign management etc. I broke down each feature and time/cost required for it :
1. CRM (Customer and contacts management, insights), 10 days, $2500.
2. Social media management, 15 days, $3750.
3. Appointment Booking and online Calendar, 10 days, $2500.
4. Text Email Campaign management, 10 days, $2500.
5. Payment, Invoice Management, 10 days, $2500.
6. Online Presence & Listing Management, 10 days (depends on number of sites to be supported) +$2500.
Btw, We are a development agency with more than 15 years of experience developing web apps and will be very happy to work with you. Kind Regards.