I want to add that Trump is the worst sort of braggart -- truly annoying. While it is no secret that he's wanted to build a Trump Tower in Russia, all we've ever heard about are "plans" or "intentions". Never actually heard of a deal being struck, ground being broken, or anything of the sort. And considering his proclivities for bragging, I'd find it a bit odd that there wouldn't have been any public mention of this -- prior to him running for office -- if it was really happening.
What I personally suspect -- thought that's all it is -- is that he does indeed want to build one there, and it may well happen if he loses the election. There may be documents, etc., showing that he's had consultations/analyses done to that effect. In other words, he's strongly considering a major Russian investment, perhaps even talked to Putin about it, but it hasn't happened yet. Else, the paper trail/leaks would already have come out.
That still suggests that he'd have a pro-Russian bias, although assuming he does the usual "blind-trust" thing, it's not really a negative if he wins. I suspect that any such plans would only come about if he were to lose.