The most expensive listing on the Greater Boston AirBandB site appears to be this $2,545 Arlington house-share with a remarkably passive-aggressive list of house rules: "Please enjoy a suburban lifestyle, notify me if planning a large crowd. Quiet neighborhood & we want you to have fun! ... Welcome to gardening in the bkyd / vegetable etc. ask if there is some thing you would like to plant in the front yard etc. We want you to feel comfortable & treat this as your home." Sure.