I agree with Tumbit. As they are friends of friends… etc….
They may not be willing to pay much (as they may see it that you are getting a ‘luxury hol’ in return for house/pet sitting).
I was asked by a friend/aquaintance once (when she wanted to book me for 2 weeks), 2 dogs inc, I asked for Eu 10 a day.
Basically, it would have cost her Eu10 per day per dog to put them in kennels, which she didn’t want to do under any circumstances.
But she turned me down as she had had a free house-sitter previously.
Guess it is as the old saying goes - what is it worth to the person.
(I have seen an article in EWN recently for someone offering free house sitting (min 6 weeks), in return for place to live.
The difference is, I don’t need anywhere to live and I would be doing it as a paid service. Which some people don’t want to pay for)
Hope this helps 😉