virtual tour accommodation

It really comes down to what you want to do with the panorama in terms of presentation. From your post it is obvious that you want HTML support for mobile devices.

Are there a number of Panorama 360 hosting sites? free and paid which offer a range of services for panoramic photographers we use Montreal web hosting. The range of sites allows you to create tours, add multimedia, embed your panoramas / tours, publish on Google Earth and share via social media. The list is long and the features are suitable for almost any requirement.

The question to ask when choosing a site forWeb hosting your panoramas is how do you want to be able to access and publish them outside of their respective sites, do you also want to be able to post your panoramas in a timeline Facebook or embed them in an external website. All sites allow you to embed your panorama in an external website and provide the code to do so!

From a portfolio, ease of use, interface quality perspective, I think it's hard to beat RoundMe. I'm doing a bit of development work for HMD at the moment and RoundMe VR support is excellent.