Sorry Charlie, your property is being sold with the lease outstanding which means the new owner can not take occupancy until the lease has run its' course. HOWEVER, once the new owner takes possession of the property, you may renegotiate your lease with them. You have other options available to you. We'd need to know:
Terms of lease
Amount of lease
My husband and partner, Robert, is a commercial Realtor and investment property specialist (your property falls under that umbrella.) Feel free to give him a call at 214.205.8372 and he can help you further.