Those businesses that you claim pay inheritance tax can currently claim BPR when inherited,at a rate of anything from 100% to 50%.,so the same as farmers,they will be affected by the changes,the same as farmers,BUT,the return on those businesses is far greater than the average farm income is. Companies that have to own large premises or land to park vehicles on will be worst affected,IE,livery yards,plant hire companies,transport and haulage businesses.
I don't know what you class as "real family farms"? We own a family farm,been in the family for 100 years,5 generations. It's as small a farm as can still be economically viable at 200 acres. We will be badly hit by the changes to APR and BPR. Interestingly,there were a lot of tenant farmers on the coach with me to London on Monday. They will be hit too,as they explained. If their land owner's family have to sell land to pay the tax bill,are they going to sell the land that they themselves are farming,or the land that their tenant is farming? And that tenant will still get stung as when inheritance tax is calculated,they list everything,the land, buildings,equipment,vehicles,livestock,chemicals,tools,they even count the bales of hay and straw in the shed.
It's very clear that this policy is the politics of envy writ large,but,you reap what you sow,and I'm sure that the resulting food shortages will save the NHS a fortune on anti fat jabs.