If you no longer own the mobile home that is on your property then your option is to write the owner sttaing that the item needs to be removed by a certain date or that from then on "rent" will be so much per month.Keep a copy of the letter for future use and need. If the unit is not removed by the demanded date, your option is to serve a thirty (30) day notice to vacate and begin the eviction process against the owner of the mobile home much like any other landlord.