Getting the mobile home does not mean that you automatically get the property that it is set on. For this to happen, you have to buy the property. It would be best to check with the local authorities to find out what the best settlement would be.
That is a counterfeit payment. What value does the wobble box have if you can't use it where it is or move it if you had a place to move it to? He simply gave you a pile of his trash as payment for your labor and obviously thinks you are stupid enough to accept it and haul your labor payment off of his property. Well? Are you going to man up or take out the trash?