Hi, my grandfather passed & his land was deeded to me (trustee deed)with my uncle retaining an undivided one half interest in the form of a life estate in the property with me being the remainderen. We have shared 50-50 on the farm income for six years now. My uncle lives in Ky and left me to manage the property in Ill. I have executed 3 leases over the years to tenant farmers and he has accepted his share of the income although he has never participated in the negotiations or signed the leases. He has never questioned my decisions on who to rent to or at what price. Recently I decided to sell off part of the farm (subject to his life estate). He is very unhappy and has vowed to make it hard for anyone purchasing the property. He called my buyer and threatned to complicate anything he could with lawsuits. My question is who is responsible for determining a fair rent for the tenant when I own the ground but he has a life estate in an undivided half of it? the current rent is reasonably.

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State/Country relating to question: Illinois

Already Tried:
can he halt the sale of my interest? he claims since he didnt sign the lease with the tenants that it is void. he did cash his check for his share but there is one more year left on the lease and he wants to raise the rent now. the rent is comparable to other ground in the area. do i have any recourse if he threatens and scares off my buyers?