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Hang at least 48 inches from the ground and at whatever height
is comfortable for you. This article should also help: https://www.gardeningknowhow.com/special/containers/upside-down-gardening.htm

This article will help:
https://www.gardeningknowhow.com/edible/vegetables/tomato/yellow-tomato-leaves.htm

With a Topsy Turvy planter, chances are the water is not getting deep enough into the container. Make sure that you allow the water to move all the way through the container. If the container dries out completely, it can take some time for the soil to re-hydrate.

Yellow leaves can be caused by several things. This article covers what they could be:
https://www.gardeningknowhow.com/edible/vegetables/tomato/yellow-tomato-leaves.htm

Likely with the topsy turvey planter, it was a lack of water. Containers dry out fast and need to be watered 1-2 times a day to keep them watered enough.

If you only got one rush of fruit, this is a determinate plant, meaning it produces fruit all at once and then stops. For season long production, look for an indeterminate plant. They keep producing fruit until frost kills them.

Bird netting is a great idea if birds were a problem.

not worth the effort, have to water too much

Here is an or two article that you may find helpful: https://www.gardeningknowhow.com/special/containers/upside-down-gardening.htm
https://www.gardeningknowhow.com/edible/vegetables/vgen/vegetables-grown-upside-down.htm