This may be too late to be relevant to your work but here's a recommendation anyway.

For a Simulation environment AND cloud service combo that's least expensive (IMO) I'd recommend going with NAMD on AWS.

Here's a helpful link: https://www.ks.uiuc.edu/Research/cloud/

Relatively inexpensive and pretty easy to set up (I think they even have an image that you can just purchase without needing to set much up).

Best of luck.