Ok it is coming up here in a few more weeks.

Here is my plan of action.

Obtain coffee grounds from an endless free supply of them.
Pick up at Starbucks. They will hand you a bag ~8lbs. 1 store will have 2-6 of these bags during 1 work day.

Obtain 5 gallon rectangular buckets with lid and food grade. From an endless free supply of them.
Pick up at Sam's / Costco Bakery In 1 day they will have more than what you can fit into your car.

Obtain compost materials. For free and also an endless supply of them.
Use what you create.

Create a potting soil.
Dig a hole (mine is a small pond (covered pool)) and combine Coffee grounds, compost and straw (bought the straw) with the dirt dug up. Fill the 50+ 5 gallon buckets and plant.

Start doing this now and start the plants indoors. Egg cartons are a good plant starter container and they are free after you use the eggs.

So in all you will need to invest in Straw, Seeds, Water and your time. And the results will be semi free food.