If time or money were in greater supply, I’d probably go back over all the old sets and reprocess them to get full-sized versions of all the archive sets done as well. Unfortunately that’s very time consuming and the returns on doing so would probably not be a sensible business proposition. I might do that if I ever retire from shooting new stuff, but until then, the new stuff has to take priority!

Hum… If this doesn’t require specialized equipment, could you farm it out to volunteers? I have no idea of the complexity of the manipulations required. I suspect it’s more than just resaving images at a different resolution. On the other hand, if it is a process that can be reduced to an algorithm or procedure others might be able to help.

For example, I have a medium grade Mac Pro (late 2013) and a lot of disk storage. I also have Adobe PhotoShop CS6 and I’m very skilled at writing AppleScript applications to automate tasks requiring the use of multiple applications and multiple steps. On the other hand, I have very little artistic sense and only limited experience in using PhotoShop.

You might try an experiment with some volunteers: Send them a few images or a photo set with instructions and see what results you get. You might need a contract to protect your rights to the images themselves.