Your only real option is to sell them as products. They are not an attribute of a product.
As far as the amount, yes, it can handle it, that is not to say you can handle it on a 2 core vps server, but a setup can be made to handle it.
I can show you how to bring back the scenes area which will allow for having schematics with links, but it is not responsive or zoomable, that would need to be custom written into the theme.
As far as excluding the products from search, that would take something custom as well. A module would need to be developed that overrode the search and limited the categories that it would index.
It is all possible though.