The legal questions might include whether the resort intends to profit from the G7 conference, or host it at a break-even or loss, and whether Trump has distanced himself from the operations of the resort. I can only assume that White House counsel is guiding him on this.
I don't think Trump is impeachable for hosting world leaders at his hotel. I guess we'll see if this gets added to the impeachment inquiry.
Why do you assume that? I now assume that Trump isn't listening to any sort of ethical or legal advice when it comes to stuff like this, and as far as I can tell I'm right 100% of the time.
But anyway
a) it doesn't matter if the resort profits or not, it's still against the emoluments clause
b) there's no way that it will be for break even or worse
c) even if it is for break even, the resort is currently losing money (from what I have read) so that's a huge gain for Trump Corp
and most importantly
d) YOU CANNOT STEER GOVERNMENT FUNDS TO YOUR OWN BUSINESS. IT'S AGAINST THE LAW, NOT JUST AGAINST THE EMOLUMENTS CLAUSE.