Seniors

You can't obtain title through adverse possession if the owner allows you to be there.

https://courts-state-nh-us.libguides.com/adversepossession

"The elements of adverse possession are: the use must be adverse (without permission and hostile to the owner's interests); it must be notorious (the owner has had notice of the use); it must be continuous and uninterrupted; it must be exclusive (not in common with neighbors, or others), and it must be for a period of at least 20 years as defined in the statute of limitations for the recovery of real property (see RSA 508:2, I)."