Hi @Julian295 I hope you are well!
Sounds like it could be a very interesting project.
You should really sit yourself down and work-out what you'd be happy to earn on an hourly basis for the time you'd give to being a co-host/property manager.
I work as a full-time co-host and property manager, and work with various hosts in different ways depending on their needs- which varies from a overall % of the owners earnings to a flat rate for certain services that aren't required all the time.
It's really up to you to work out what you would be happy to earn to ensure it's worthwhile for you.
Bear in mind that large Airbnb property management companies will charge a fee so low that a single person co-host couldn't compete- but low fees often translate into low service which translates into low guest review ratings, so make sure you deliver amazing results for every single guest stay and really earn what you're charging.
I would also take care in terms of working with friends- a good friend isn't always a good work partner 🙂
Best wishes with whatever you decide to do!
Paul.