I'm planning out the vegetable garden this year. It's going to be a mix of raised beds, mounds and cones for beans. I'm kind of most excited for the cones since basically what you do is make a teepee and it will be big enough that my niece can play in it. It won't exactly be a source of income and this year the cost for set up might exceed the savings in groceries however one day it will benefit the wallet. Currently I'm trying to figure out how I can build an irrigation system for the raised beds. I found a very simple design however limited water pressure might crush that dream. The best I've come up with is setting it up so I can just screw the hose into one bed while I work on another and keep switching it until it's done. The other option is setting up a bunch of timers to do the switching for me however that can get pretty expensive fast.
That's something to think about although all the drip irrigation I have seen is above ground and I was leaning towards having everything under the soil to lessen the amount that would just evaporate. So basically I would drill a hole in the side of the box and have pipes running in kind of a U shape to water the whole bed. This also means the animals that will, despite my best efforts, somehow get in can't wreck the system too badly. Edit: It seems like what I'm getting at is essentially a drip irrigation system just without the actual dripping since it's underground. "sub-surface drip"
Look into drip tape. You can cover it and it still works fine. You will have to have some sort of hole in your box but it could be as small as 1/4 in for the small drip tape. The 1/2 in stuff can only be run in straight lines but the 1/4 in stuff can be looped. It works a lot better than the cheap soaker hoses you buy at Walmart. Drip irrigation doesn't care if you burry it since you aren't relying on water pressure for dispersal