How do I remmove buildings from my property that belong to somes one eles?

I am having some difficulties whith people living on my property. we are attempting to evict them but if that dosn'twork . how do I go about demolishing the outbuildings that they have put on my property?I have already spoken with the pima county building folk sthay said that outside tucson city limets ther is no code for the condition of buildings whithin the county. they are falling apart, & have caused damage to our home when it gets windy ,& one of the kids has been hirt due to the neglect of theese out buildings I also am a house breeder & need to keep my horses from getting hurt. I know that as the property owner we areresponsableforevrything onproperty. but we would like to get them gone whithoutlegal issues following us on this. & the eviction is taking longer than expected