Long Lease for Hotel Conversion?

Hi

I want to lease a building and try and convert it and use it as a hotel/ hostel

I prefer to lease as i'm aiming for central london, where property freeholds are expensive

As its my first experience with leasing I have several questions:

1. Is a long term lease the way forward with my aim?

2. Are landlords happy to enter long term leases?

3. Should this lease have a break clause for both parties?

Thank you & Happy Easter!