The next picture shows our raised beds. Because we had to spend so much time amending our soil/sand, raised beds helped quicken that process. The amendments are more concentrated so you don't have to fertilize as often. Also, I do cut flowers which reseed like crazy. At first I thought that was delightful. Later I discovered you could only grow so many bachelor buttons and cosmos. The raised beds helped deter reseeding and allowed the smaller plants to grow and not be choked out by cosmos. We placed weed barrier around the raised beds and added bark. This has kept the weeds and reseeded flowers down.
Another advantage to raised beds is less traffic on the garden soil. If you don't walk on the garden plot you don't pack down the soil. The amended soil stays fluffy and easier to work with.
Again, I would recommend raised beds. We used recycled wood so the expense was minimal. Now if the weather would cooperate, we could once again experience the effective, efficient raised beds.