How is this a crime? How could this possibly impeachable? Would it even matter if Mr. Trump had built a resort hotel or whatever in Moscow. He builds them all over the world! So what? Are we then only to elect career politicians for president, people who have never done anything else but flourish and enrich themselves in the DC swamp?
While many of us cling to the Quixotic notion of our elected officials being of the "Mr. Smith Goes To Washington" vein, your point about career politicians is spot on. Trump is no more into personal enrichment than our career elected officals. The President's crime is one of being an outsider, and unfortunately the NeverTrump factions can turn that into a high crime and misdemeanor.