Stripe Connect & Cashier

I've got a project i'm sloooooowly developing in TALL stack, I'm not that great at the backend stuff and I seem to get lost doing what appears to others as simple stuff.

It's coming to a point where I need to speed the development process up and want to get some help in to connect the site to use Stripe onBoarding and a small booking system using Cashier...

I've use a developer before, when I started to do this in another framework, but their preference was Laravel, when lockdown started I shelved the project and thought about redoing it in Laravel as they work in Laravel, I've got it to a point of handing it over so they can integrate Stripe Connect and develop the Cashier for the booking system (ideally I'd like to do this myself, but I'm not confident enough)

OnBoarding starts at registration, if a general user no onboarding takes place, they create an account and can update their bio and use the booking process....

if a company, they get redirected to a form to fill after registration all details in for onBoarding are collected here,

Then the company can start creating Items to book in their admin and manage incoming bookings.

The user, Books an Item -> goes through Cashier Process -> then redirected to the site, where they can manage booking.

My question is using something like https://github.com/ExpDev07/laravel-cashier-stripe-connect and cashier how long would the development roughly take for an experienced Laravel developer??