Before you meet have him send a photo of his driver's license or passport. Run a background check.
Meet in public places first time so if you get bad vibes you can bale out.
The truly rich SDs are not hanging out here. They have the butler order their companions. If a prospect is chatting you up rather than talking business you can bet they are on a budget. Which may be zero and just getting off on conversation or a free meet & greet.