If you have the right to possession by purchase, and it's vacant, drill the locks.

That is enough to show abandonment and you can take possession.   

What are the requirements to get rid of the tenants possessions they have left on your property?

Plan is do cash out refinancing in next 3-6months after taking the possession.

It seems that more people are trying to claim adverse possession when they are in fact just squatters:http://www.wftv.com/video/23549689/index.html

See what HUD has to say, if the residence can support the family under its accepted living standards, they can be there, but you can't pack 5 kids in a 10x12 bedroom.You can put anything you like, almost, in a lease, enforcing it is another matter, get a tenant who understands their rights more than the landlord does or can cause trouble, and may likely be warranted.Let's face it, most mom and pop landlords don't have a clue as to what they are doing when they lease a residence, they are leasing part of the owner's rights in title, rights of possession with quiet enjoyment, yet, they still like to think the can lease those rights and remain entitled to them at the same time.

You already have a writ for possession, but now the tenant's are appealing? 

., open permits), there can be other issues that prevent a closing from occurring, such as out-of-possession property lines, seller's non-ownership status, restrictive covenants preventing an intended use or just the efficient use of the property, existing liens against the real estate, current tenant issues with estoppel letters not being forthcoming--and many others.

In Wisconsin the hearing takes place within 25 days, 10 days for Writ of Possession, under 10 days for the sheriff to execute.

But in most cases, you can just try to pay them off, help them find a new home and pay the moving cost to agree to move out..If its an owner occupied, you can just file the eviction notice for possession.