Tenant wants out of lease to invest in RE

[Randon B.]

One of my inherited tenants that has always resented me because of my age and me being his land lord wants to know if I would work with him so he could buy a duplex around the corner.

He is 1 month in to his year lease, and the original owners of the duplex contacted him to see if he wanted to buy another one of theirs. I personally would rather have him out so I can get into his side and start renovating his side. 

The problem is I'm not ready with the one side yet, and I don't want the holding costs it would take to have a vacant duplex for the month or two it would take to get the both of the side ready.

I would like to work with him. I'm thinking of offering him to change his lease to a 6 month term and withholding his security deposit.

What would you guys do in this situation? 

Thanks