I would recommend Apps4Rent Hosting. Below are some features that makes it the best QuickBooks application hosting provider -
Superfast and secure - 99.995% guaranteed server uptime
24x7 customer support via email, chat, and phone
Built-in business continuity and disaster recovery service
Intuit authorized hosting,
Integration with business applications and 3rd party QuickBooks add-ons.
Learn more about QuickBooks Enterprise Cloud Hosting