I get this question a lot when folks visit the farm. Personally I would love to do all bordered raised beds with irrigation and drainage systems. As it is I do bordered raised beds in 30x96 high tunnel and on 1/2 acre of outside gardens. The bordered raised beds on average produce 40% more crop per square foot than the raised rows. Since my main garden is 500' wide and 1000' long and 11.5 acres bordered raised beds are not feasible in terms of labor to build and the time and labor to mill the post oak borders. For a small garden 1/8th of a acre home garden or so I would highly suggest raised beds. For a Market Garden or rather series of fields raised rows are much more practical. building the raised rows in the spring. You can get a Cat 0 or cat 1 disk hiller for around $200 6" raised bed in the high tunnel I use for mums to cut starts off of. Most of my bordered raised beds are 10"-12" borders. I cut T Post in half or 1.5" PvC pipe into 2 1/5 foot sections to secure the borders. Easy to remove if you need to, and the end come right out to let the bigger tiller blaze up and down them. LOL 2015 the year of drowning rains here. The depressions between rows very often looked like rivers! A little engineering on the disc hiller, can't see the bow in the cattle panel section well but it and the chicken wire pull the soil on top of the ridge into the center, which is great for covering seed potatoes and onion sets. The chain just flattens the top out a bit. I can get about a 14" high raised row using this hiller. And my dog picks the weirdest places to lay and supervise me. The Garden goes 1000 feet from fence line South and 500 feet East to West And no chemical 'cides or fertilizer are ever used. Nope I didn't beat the rain that day But all total 73,600 pounds of fruits and vegetables came out of that garden in 2015.