I think all your ideas are possible, except for moving an outdoor soil plant back indoors into a hydro system. It would be a lot easier to just grow a new plant. Transplanting the plant now is easy - just bury any hydroton that doesn't want to come off the roots. Transplant shock will be less that way as well.

If you are going to do multiple plantings, then a determinate variety will give you higher production. There are also now several indeterminate dwarf varieties that have been bred by volunteer backyard gardeners across the world to have heirloom flavor. I'm trying them for the first time this year myself: Sweet Sue, Summertime Gold, Tasmanian Chocolate, and Perth Pride are some of the names. They are open-pollinated, so you can save the seed.

Hi You can cut a hole in the lid of a 5 gal (19 litre) bucket that is sized for the net pot. Put a bubbler stone in the bottom and use an aquarium air pump to keep the water oxygenated.
I run 3 buckets off of one pump.

Here are some of my bubble buckets from 8 days ago. They will hopefully be going out side for the summer. there are tomatoes, strawberries and one bucket with lettuce.

Glen

Looks great, everybody. Thanks! I'm gonna go with the bubble bucket method. Thanks for the heads up on seeds too. I got a "better bush tomato hybrid" that looks strong and says it produces year round, making moving it back inside under the lights when the weather gets cold again a nice option. Glad I didn't chuck it into soil thinking it'd be easy to get back into hydro again. Bubble bucket seems most reasonable solution. Thanks again

Added another bubble bucket. the tomato plants sure have grown. This is eight days later, from the first picture posted.

Glen