Hello @Matilde and a very warm welcome to TrustedHousesitters and to the Community Forum 
As @Silversitters mentioned, the large number of animals including 8 horses could put many sitters off so it would be good to include how much time this would likely take each day. Having said that there are many sitters out there like my hubby and I who have happily cared for 12 horses on a previous sit including other various animals (20+ including the horses), on the same sit so it is not an impossible ask to find suitable sitters.
As @Lassie mentioned I would suggest adding your TrustedHousesitters profile on to your Forum profile on here by following the attached link, should you wish. This will then enable others to offer you helpful advice and feedback and will also give your listing extra exposure!
If you are unsure how to do this, or if you have any questions at all, do not hesitate to ask, we are all more than happy to help.
Also, remember you can use the spyglass symbol at the top of the page next to the TrustedHousesitters logo and search for any questions that you may have as they have most likely already been answered on here and of course if not then please just ask! 