DH is one of 7 siblings that would inherit his parents farm when they die. But at the moment most of the land and farm buildings are being leased by an outdoor activity company.
They want to extend their contract by 25 years and build on the land.
Once dh's parents die, would not the fact that their business is tied up in the farm and they've actually built on it give them rights to be tenants for life? Dh is worried that they'll never be able to sell the farm as they'll never get rid of the tenants.