We do this all the time in the sandy areas of northern Michigan. LIME, LIME, LIME!!!!! We suggest that you lime off the charts. Limeing to a point is good for a year or so and then you have to go back and start over in the more well drained soils. We suggest that you lime 2-3 tons per point per acre to 7.0. This should last for 3-5 years or more. In your case you will need to lime at 10 tons an acre.... I know, it's a lot, and most folks use the upper level to lime a plot at 5 tons an acre, but you'll be glad you did.
Disk the area up and lime. Then, float disk the lime into the soil and cultipack. Plant and fertilize, we suggest you stay away from salt based fertilizers because the salt will run the worms and bacteria out of the soil They keep the soil aeriated and add humus to the soil.
Plant an annual like rye this fall. Go back next spring and plant buckwheat and then re work the area next fall and plant the perennial of your choice. ALWAYS do soil samples. I would think an alfalfa plot would be your best bet...

Romans 10:9 Psalms 42