Frank - we like the roma for paste.
Yeah we have hundreds of fruit from about 10 roma plants and 100-200 fruit off of 10 mr. stripey vines which could have grown to maybe 10 feet long if I wasnt a mad pruner!!!
Soil is vital folks - try adding 1/5 part Perlite and 1/5 part vermiculite to your mix.
Add some sand if you soil is to compact.
Mulch - from my experiences everything benefits from mulch especially during hot periods.
Yes peat pellets kinda suck

I guess we will go with wooden planter boxes ultimately yet for now those black plastic ones will suffice.
Ok watering - once a day??? for container gardening maybe but you should only need to water a tomato plant once a week or so unless perhaps during a drought.
Daily watering could easily lead to root rot unless you have some excellent soil drainage.
A one gallon container will bear fruit - try roma plants in containers - smaller fruit - and from my experiences they will wilt in 2-3 days so water every 2-3 days.
2+ gallon containers are expensive yet that is what I would go with on a balcony.
Pests - there are plenty of Companion plants that will repel pests away such as Garlic, Basil and Tansy.
Our vicious attack cats and dogs keep moles, rabbits and other critters far away from our garden and even though they sometimes litter here and there the trade off is worth it
BTW - FYI - the little white "eggs" on the back of the hornworm are not hornworm eggs but parasitic wasp eggs - we still pull the hornworms off yet if I had a real bad problem with them we would allow the wasps to mature on the worm.