Yes, you want Saudi Arabian money to go to Turkey rather than other countries. We get it. Can you now stop barking (trolling) in this thread and the otherwise peaceful Arab section? If you have something useful to say, you are very welcome if not, find another place.
KSA will work with Turkey as has been the case for quite some time (you might not be aware of this fact) as well as numerous other partners ranging from the US to China, Russia, Ukraine, South Korea, fellow Arab states and numerous other countries. KSA has big ambitions, money, resources, an educated population, a lot of youth and a lot of potential. If Turkey can help KSA with accomplishing its goals in terms of creating a strong indigenous military industry, KSA will of course not say no, just like KSA has been investing in Turkey for decades long before Erdogan became relevant.
You need to stop trolling and learn to control your anti-Arab hatred. This is good news for all parties involved (if true) and such a thread should not be used for trolling. You don't get it though.