Excellent. Two of my clients need exactly this service. We have the pain point you describe, i.e. needing to build out AWS, Rackspace, etc. Currently we build custom AWS images, however we'd much rather pay for a HIPAA stack. Kudos!
We offer a 30-day free trial, so you can play around with our API without entering a credit card. Caveat -- don’t send us any real PHI until we sign a BAA.
Please feel free to test it out, and if you have any questions shoot me an email. trey@truevault.com
We get to see a wide variety of use cases, happy to share our experiences.