ADDRESS: 4611 N Minnesota Ave. WHY IT’S EMPTY: Out-of-state investment gone wrong. Las Vegas developer Max Sass makes frequent appearances in our vacant-property files. He popped up in Northeast Portland four years ago, promising to build affordable housing at an abandoned car wash. (State funding dried up and Sass dropped out.) The next year he promised to turn a historic Alphabet District church into a luxury hotel. (The deal stalled.)