Pull the battery's out, they will be no good after one year also use some fuel stabilizer do not put broken tv and lap top, etc leave shades up cover furniture with old bed sheets, pull fuel pump relay and the fuse.
As long as the idiots can see that there is nothing of value they will move on, take the unit to a Ford dealer and have them pull the radio out, 2 wires in a u shape and 2 plugs and antenna, he can also pull the front seats, four bolts per seat.
I would find a more secure place.
navegator
