I totally agree, I have a lot of questions about the whole Saudi Arabia project. But here's the thing, Joey told several people that there was a Saudi deal, and that Chase was going there to install the project. Patrick, Dan, McGyver, MSM, Mike...all knew about it before the disappearance. So if Chase had something shady going on re: the Saudi deal then at the very least Joey was complicit as well.
And IMO it seems unlikely that Chase would have been allowed into the country of SA but I could be wrong. I would think that Joey and Chase would have secured a passport for and verified permission to enter Saudi BEFORE investing the TIME and MONEY into a fountain that Chase might not have been cleared to travel to install. But we know that Chase didn't even have a passport upon completion of the project, Susan had to front him the money for one. (If he even used that money to get one, I don't know).
In the end I have no idea if Chase really went to Saudi or not, this is yet another thing that would be super easy for LE to clarify, there would be documentation via his passport (if he got one). Maybe we will hear more about this in court. All IMO.