Billswift, after thinking it over some I'm surprised how much one person could do, if they knew not to follow any blind alleys. Like, you could do all the experiments needed to support Maxwell's equations in a reasonably short time if someone helped you set up the equipment.

It took a lot of people a long time to do it, but that's because they didn't know what they were doing ahead of time.

I don't know where the limits would come but they might be a lot broader than I first thought.