Kajabi custom coding and Zapier/ Hubspot integrations

Important note: I have many small projects of similar scope that all need to be completed in the coming weeks. I am looking for a longer-term relationship where we can work from project to project. In-depth experience with Hubspot, Kajabi, Zapier, coding, GoDaddy DNS settings is a must. Experience with other CRM will not be considered.

First project:
I'm looking for an expert who can support me in finalising my first offer. We will do this live with a screen share and you will walk me through the process step-by-step so I can replicate it for subsequent projects. I expect this to take 2-3h.

Landing page and assets are already fully created. I need help with the backend.

Custom coding checkout page:
- add ability for customer to check out multiple guests in one purchase. Example here: https://clevermarkets.com/technical-analysis-academy-registration
- Add ability for customer to request an invoice instead of paying with credit card (custom fields then need to be added to fill in the invoice)
- This will be additional work that has to be done off-screen by you.

Misc:
- customise full URL. Not just the second half of the string. This requires DNS record updating on GoDaddy. This will be done on screen share so I can learn.
- some other backend fine tuning might be required to set everything up properly

Zapier:
- After the purchase, add all details to Hubspot as well as Google sheets. This will be done on screen share so I can learn.

Please contact me with a time estimate and a price quote. This will be paid on a project basis. Do not quote individual hours.