Hi @Betül16,
That's quite an exciting project!
Whereabouts in London are your properties located? You could try searching in those areas to see where calendars are full; that could give you an inkling as to where demand is high. You could also explore other market research avenues. 🙂
The community center is a space where hosts can support and inspire each other, so if you have any more questions about starting to host let us know, I'm sure we other members would happily share their experience with you.
Thanks,
Emilie