Sounds ambitious. First of all please update your profile to show your location and zone information
This link can help you out with that. Where you live will determine what you will be able to grow.
https://www.springhillnursery.com/zone_f ... QgodKjgA2Q
According to Square foot gardening a minimum of 16 squares or 1 block 4x4 (1ft blocks) is the minimum space for each person in the household. For four people you would need a minimum of 64 blocks or an 8 x 12 ft space = 2- 4x8 ft long beds with at least a two foot row between them to get around to plant, weed, harvest without stepping in the beds.
Mind you this is if you are using the square ft method and you plant intensively. If you have more space than that or you like really big plants, it would be better to have more space.
Make some decisions first.
1. How much time do you have to devote to gardening? Most people have to spend at least some time on it every day. More in the beginning when you are prepping the soil and while the plants are small you will need to keep the weeds at bay. Watering can be automated with a drip system and timer that you install after the beds are prepped but before you plant, otherwise plan on spending some time every day or two watering, weeding or on bug patrol.
2. Make a list of the things you like to eat. That is what you should plant. If they are big plants like tomatoes, zuccini, eggplant, I plant them in containers on the perimeter and not in the square foot garden. They take up too many squares. Some things take up a lot of space like corn and the yield is low for the amount of space they need so decide if they are worth planting like corn, squash and watermelon.
3. Draw a garden plan. Tall plants should go on the North. Also plan for trellises for beans, peas, cucumbers, tomatoes and the like. The site should get a minimum of 6 hours of sun a day.
4. Are you going to compost? If yes, then plan for a compost pile.
5. Where will you be potting and storing tools? Do you have a potting shed and a place to keep seedlings if you plant in succession?
6. How far away is the water source?
7. Dogs can be kept out of the garden with fencing and training. Hoops and nets or row covers can get you some protection from pests and frost. Other pests are quite crafty and you may need other deterrents.
8. After you decide what plants you want to grow, you will have to separate the warm and cool season crops. Perishable short crops like lettuce can be planted in succession every couple of weeks so you will need to propagate and maintain seedlings. It is best not to plant the whole package but just enough seeds for the amount of lettuce you can eat in a couple of weeks.
8. Try some cut and come again crops like Swiss chard, kale, eggplant, peppers, and tomatoes. You can get multiple harvests from these plants and they last a long time. Kale, Chard, beets, arugula are things you need to acquire a taste for so find some great recipes.
9. Consider growing things you use a lot of, are relatively expensive to buy, taste better fresh, and are easy to grow. HINT: Celery, Iceberg lettuce, and head cabbage are not the easiest things to grow. Herbs are relatively expensive, taste better fresh, don't take up much space and are easy to grow. Onions, carrots, and potatoes have a long growing season, unless you have a large space, you probably cannot grow enough to meet all your needs and they are relatively cheap and store well.
10. Don't bother to grow things you don't like even if they are easy to grow. For me that would be radishes.
11. Now if you can come up with an automated weed puller, snail, slug, and bug catcher I might be interested.
Happy gardening in Hawaii. Gardens are where people grow.