Virtual Booth

I’m looking to develop a custom virtual booth for my event. Link below is an example of the full flow i am looking for. It should work for computer and mobile. Photos taken should request user whether to be added into a master gallery, if user approves, it should display in a master gallery list.

https://app.virtualbooth.me/booth/halloween2

Do let me know the cost and timeline. Any previous similar work is a plus.
Data collection is a plus.
Special features are welcomed for proposal.