Like I have said before, if a local dive club bought a compressor (it's been talked about at meetings) and could do vis/hydro I would have no need for the LDS at all, which would be fine by me.
I have seen it tried twice. It didn't work either time. There were too many logistics to work out. In both cases, they had the compressor already, so initial purchase price was not an issue.
1. Where do you store it?
2. How do people get access to where it is stored?
3. Who maintains it?
4. What kind of liability insurance is needed for the club members, and how is it paid?
5. What kind of insurance is needed for the fill location?
6. How can you be sure safety standards are being followed for fills?
7. Are you going to have nitrox made there? If so, how will that be done?
8. If you are going to do nitrox through partial pressure blending, how will you ensure that whoever is doing the blending is properly certified and is following procedures that will not result in the building blowing up?