@Andrea7656 No one is going to be able to answer this question for you.
If the ownership is equally shared then you could try the following:
Allocate a price to each task recognising that some tasks are more popular than others eg:
The price could be allocated on a bid basis with each family member 'competing' to take on the cleaning, management etc. This will then get to a price each family member is willing to be paid
Cleaning $XX per stay
Managing the listing $YY per week
Greeting guests $ZZ per stay
etc.
Add to this the cost of repairs, restocking supplies etc
THEN at the end of the year or month 'pay out' these amounts to those who have done the work.
Let's say you have paid out $500 from a profit of say $1000. The remaining $500 could then be paid out in proportion to the monies paid out. This way those that work harder make more money!
If the property is not owned equally then the ownership costs should be taken out before the profit is calculated.
Hope this helps