Hi Vicky,
A few questions:
1. Is this quote for all 4 phases?
2. How deep are you into the design process? Did anyone start a mood board?
3. Do you have any existing assets, like professional photography, corporate photography or a design guide selection?
4. Are you willing to launch with one feature, done great, so you are quick to market fast, and then add on other features after launch?
5. Do you have an existing community of users, for instance on social media or a local meetup?