A friend(pal) who's burden(albatross) outweighs the benefits of their friendship.
A palbatross is someone who comes over and drinks your beer (but never brings any), keeps you up all nighttalking about their problems (but never listens to yours), or can never return a ride to the airport (despite you giving them dozens.) You wonder why they are even your friend?
A Shackteau is a humble, weather-beaten, structurally questionable shelter located in a spectacular or highly coveted place—Wales, Jackson Hole, Sun Valley, Crested Butte, coastal Maine, the Alps—where the building itself may be worth almost nothing, but the dirt, view, access, and mythology make it absurdly valuable.
In use:
Shackteâu - We thought it was an abandoned shed until the realtor called it a rare alpine Shackteâu with unobstructed views and listed it for $2 million.