It is their property, even if they are not making good use of it, are not being responsive about it, etc. There is no way to "bypass" the owners and take their property, even if they are neglecting it and any logical person *should* sell it to you. It'd be the same if you had a classic Mustang that you were letting rust away in your driveway and had no intention of driving: someone else, who wanted to restore and treasure it, could not take your car from you or even force you to negotiate over it if you did not want to--it's yours to do with as you wish. Similarly, these owners have the right to own and yet neglect their property, and don't have to respond to queries about it.