@Clever the terms and conditions say that a sit should only be cancelled for extraordinary circumstances ( like a bereavement) .
If a sitter or homeowner cancels without a good reason, the other party can raise a member dispute, an investigation may take place that could result in disciplinary action against your membership.
There’s no problem in applying for multiple sits but you should not confirm the sit until you are sure that you will be able to do it.
The process is that you will APPLY
then if the homeowner likes your application you can arrange a video call to discuss the sit
If the homeowner chooses you to sit they send an INVITATION to sit.
You then ACCEPT the sit .
Then the sit is confirmed and from then neither party should cancel unless there is are extraordinary circumstances.
You can withdraw your application any stage before you have accepted the sit.
It’s likely that you won’t get every sit that you apply for , so you can apply for more than one at a time, even if they are for the same dates. However, as soon as you have accepted a sit withdraw any other applications for the same date.
UK is a great place to start off as there are so many sits available so you have a high chance of being accepted. It sounds complicated to co-ordinate a sit itinerary but there are lots of sitters on the forum who have done so successfully so I am sure they will be along to add their comments and suggestions to your thread soon .
https://forum.trustedhousesitters.com/t/relying-on-house-sitting-while-traveling-to-europe