I am a firm believer that a balance between work and home is achievable, and not just for lower paid roles. If you as an organisation, have recruited to your values and believe that the person in the role has the ability to manage their own work load at the office, then why not in another location.
Is the work environment so fast paced that a 4 day week is not achievable?
How does the team survive when someone is on holiday or off on sick leave?
This is a really encouraging article – have a read