If you like work; or need exercise, you can always try double digging.
https://en.wikipedia.org/wiki/Double_digging
BTDT and it sucks and only lasts a few years it seems like.
CaptainPhilFan described it as red clay and I don’t know if that’s the top soil and there’s a redder clay down below or if the top soil is simply gone. If it’s gone and there is no stratification between a topsoil and subsoil, double digging won’t do much. She/He/The may want to dig dig a hole a couple of feet deep and see that’s what. See if there’s layers or just all red clay.
I got lucky when I bought this place. We do have red clay for subsoil and a lot of rocks and many people don’t have much of anything for topsoil but this place has a flat spot with anywhere from 1-2 foot of fairly rock free clayey loam and according to the USGS soil survey, this type of top soil/subsoil combo is considered prime farmland. I only have 2-3 acres out of 14 that’s not rocky as can be but that 2-3 acres is enough for me. The goats seem to be fine with the rest and I don’t have to trim hooves because the rocks do it for me.