Lots of good comments here. I can't really speak to raised beds. I'm just stuck on thinking that having concrete work done is the most expensive way to do it, and unnecessarily expensive. I understand the side benefits of gardening, but to grow vegetables to 'save money' is hard to do (impossible, in my opinion) if you spend a lot creating these beds. Anyone, please correct me if that's wrong for those who have raised beds.
If you have to do most of the work seated, how far can you reach for any length of time? Or can you stand for a bit, to pick from treliis and plants, and poke tools into the soil?
Who is going to make or pave whatever you need done? Will these beds add value to the property?