If you can swing it money wise, Super Soil is hard to beat, pretty much just water every couple day's, and that's it.
You can also save that soil, same with the Fox Farm. Make yourself a worm bin, and get some California Red worms from Uncle Jim's Worm Farm.
At the end of each grow, toss the soil, roots, and chopped up plant stem in there, along with kitchen scraps such as egg shells and coffee grounds. You will have some nice soil to plant your next crop in after a couple months of just sitting there in the worm bin. Obviously, if you have a pest or disease problem, don't put the soil and plant leftovers in there. Nature has all this stuff pretty much dialed in after millions of years, just let the microbes, fungi, and earth worms take care of it for you. It doesn't work to good with fertilizer salts though, since they build up in the soil every time you feed, but if you use all organic materials, those will just improve your soil over time.
Well, there I go preachin' again, but somebody mentioned less work, technology,and scientific knowledge, so just do what nature does and be a little bit smart about it, and you don't have to deal with the ph, ppm, and all that stuff if you don't want to. If you like that style of growing, then go with it, nothin wrong with that either.