So I ended up only transplanting 16 plants into 16oz cups that I had drilled drain holes into. Here's what I did...
It was hella cheaper to buy 16oz cups from Kroger than 4" pots from Home Depot, so I shelled out $5 for 100 cups. This is the cup...
I used a 1" spade bit to bore drain holes into it...
which made it look like this...
I knew that because I was working with young plants, I would have to distract Sir Purrs-alot. So I took the black pants I'd just gotten back from the dry-cleaner's and gave him an invitation he couldn't refuse. It worked like a charm, enabling me to transplant the seedlings unhindered.
After transplanting each plant into its own container, I placed it in a pool of shallow water, thinking that watering from the bottom would be smart.
But after about 45 minutes the top still wasn't moist, so I decided to just water each transplant from the top. I gave each about 100mL of warm water.
I guess I'm an idiot because it hadn't occurred to me that 84 peat pellets takes significantly
less space than 84 individually potted plants. Needless to say they don't all fit underneath a 48" shop light. So I had to stop the transplanting until I figure out what to do. And I think I have. I knew that I would have more plants than I can handle, and I expected to give them away once they were able to be planted outdoors, BUT... I don't really see the point in investing in more lighting just so I can grow the plants more before I give them away, right? So I guess I'll have to give them away now. Which makes me kinda sad.
So that's what happened.