Hubby grew all his tomatoes last year in 5 gallon buckets. They were mostly Romas, but he also had some mortgage lifters. He likes a huge tomato so that one slice covers the bread or bun on a sandwich.
I like smaller tomatoes so that I can use the whole thing in salad or just give to the kids to eat instead of bananas. Nothing worse than a tomato that has been hanging out in the refrigerator. JMHO.
Any way he had good output, and his soil wasn’t even that great.
I used Miracle Grow dirt last year. At the end of the season, I stuck it in totes and have been adding compost to it over the months. Also tossed in a couple cans of worms, and so far it looks like they have been doing a heckuva job. I've got some really nice, rich dirt to work with this year, and I'll supplement that with new MG dirt. I'm excited to see how it works out this year.