That would make a great container. One plant only. Your best results will be in growing Determinate. Rutgers is a great tomato ,also fond of Russian Persimmon.

If you browse Tatiana website for containers varieties there is lots of choices. There are also some dwarf ones that will grow in smaller containers which you can tackle into sunny spot if space is at premium. Watering will be a problem with smaller container but something can always be rigged to be semiautomatic.
http://t.tatianastomatobase.com:88/wiki/Tomato_Seeds_for_Container_Growers
Also someone might chime in which better varieties came out of dwarf project? I am curious to know as well.

Joe...that will be great. I used 15 gal nursery pots...and I think yours is a bit larger. If you want to try indeterminate heirlooms...go for it. I grew Brandywine and Cherokee Purple this year. Grow the Cherokee's...you will love them. Think out your support system AHEAD OF TIME. Next year I will...PS you will need to water every day in warm weather.

I have seen a lot of pot gardening pictures that show growing tomato in 5 gal bucket is common.( 7 dry gal ?)

S...is correct. However, IMHO bigger IS better. My plants did "very good" this year. Next year I am bumping up to 20 gal trash cans. Hoping for even better...

Wow! Thanks everyone for your input! I'm already planning for next year. Yep I'm going to try growing one plant in a large trash can(30+gallon), and also one in a Rubbermaid 36 gallon tote I'm also going to try and grow some from seed and Tatiana's website gives me plenty of choices. Growing heirloom tomatoes is a hobby with me. (I'm strictly organic). I love eating them and giving away free samples. I can't wait till February/March to start all over again..

I grew an indeterminate Big Beef in the equivalent of a 5 gallon bucket and it did extremely well. Pruned to a single stem, it reached over 7 feet before I tipped it.
I plan to do a similar idea for my greenhouse next year using Alaska Grow buckets. If you're not familiar I would suggest you have a look, it's a good idea.

Here is a link that might be useful: Alaska Grow buckets.

I seem to remember reading somewhere that a 5 gal
bucket was the minimum size to get decent results with
a full size tomato.

Of course, the bigger the better. I once used half-barrel
sized pots and had plants that bent my teepee style
cages to the ground.

Keep them watered though. Plants dry out quickly in
containers. I used to keep them in saucers full of water.
I'd fill the saucers in the morning and by evening they
were dry.

I'm really limited on space in my garden...
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Welcome to the club. You are not alone.

-- try to plann some DWARFS(mabe in pots),
-- Try to plant some determinants.

-- Try to plant in tighter space BUT be ready to do some systematic pruning.

If you do the above combination , you probably can grow TWICE as many plants as regular/standard/conventional inDETERMINANT plants in any given space.
I plant (in average ) one plant in 3 sqr-ft. 4 sqr-ft per inDET plant is just fine. But as I said you have to control them. Right now I have one of ecah : Early Girl, Black Krim and Brandywine in a a 12 sqr-ft bed. And believe me they are HUGE.

Seysonn, my real estate is limited not as much as yours, I do like your strategy though! I have few dwarf and super early det.- not that I like det. but they have their use- and indet. for earilness. I find that I am super happy to have cherry early on but as season progresses I want to have that good heart or beefy slicer far more and cherries are just not the thing anymore. Going to be first time trying real dwarfs that could be grown in 4ôèpot too...