I'm looking for guidance on the best way to continue with the offer of our investment property in Castaic, a town in Los Angeles area.

I'm looking for guidance on the best way to continue with the offer of our investment property in Castaic, a town in Los Angeles area. Our tenant has been there for a very long time and in that time he has not dealt with the property and is partaking in a lease that is half of what the market rate is. He informed us in October that he is hoping to purchase a spot in the country for cash and will most likely be out January (this month). In any case, it's unmistakable this won't occur so I am asking what my best course of action ought to be. We have a flipper keen on buying the property "with no guarantees" yet they need to make the deal dependent upon this inhabitant leaving. The tenant has said he is looking and doesn't have any desire to "be hurried". What are our freedoms, as landowners, to selling our property with an inhabitant in home? Would we be able to give him take note?