Anything (within reason) that lets you harvest all year is a good start! Ours is being reconfigured and moved so I will have to wait till spring to plant. A soil test is really helpful and worth the money. Think of it as an investment or a good tool.

Lee AKA Fireraven9
January is here, with eyes that keenly glow,
A frost-mailed warrior
striding a shadowy steed of snow. -  Edgar Fawcett

EVEN THOUGH YOUR GARDEN LAST YR DIDN'T PRODUCE AS MUCH FOOD AS YOU HAD HOPED,IT STILL GAVE YOU LOTS OF NEW KNOWLEDGE ...THAT'S STILL A GOOD HARVEST!
KEEP UP THE GOOD WORK.K

Herbal,
It sounds as though you need to to some deep research on growing vegtables in the south. With the exception of melons, okra, sweet potatoes, peppers all other crops are either winter grown or havested and frozen/canned by the end of June. You have to be astute in your seed selections. It takes a lot of study, experimenting and talking to old timers in the area to grow successful crops. For instance, the best variety of corn is Silver Queen. Tomatoes and sweet peppers should be grown where they receive afternoon shade. To date the search is still on for a tomato that will produce well during the hot summers. Lots of promises in the catalogs but that is all they are. Southern nematodes are a problem. Plant veggies with a handful of granulated sugar which will repel them. Heavy applications of straw mulch for vegetable plants in the ground should reduce watering needs. If the greenhouse watering is too much for you consider setting up a drip irrigation system to water the pots. Just a few thoughts on the difficulties of southern vegetable gardening.