What are the posibilities for farmer's advancement?

By advancement I assume you mean economic success. Most years most farms just about break even. Some years they lose money and some years (1 in 10) they make very good money. Overall, it is a tough business so you have to love it to keep at it.

Unless you have huge acreage and Congressmen you are paying to give you favorable payments (for planting or not planting various crops) from the Ag Department- then the odds shift in your favor.