Dear DA40,
you gave yourself already the answer, in what you should do. You said youŽd like to study and get an FI rating.
DO IT. YOU said you will be more happywith it, and satisfaction is greater than any 737 flight deck on this world. Especially in some more sad places of the world (the nice part for the places where you are anxious to get shot...on approach).
In the aviation world, it is always great to have two possible incomings. What is if you go Loss of License? With an diploma in whatsoever you have better chances after that. And: flying can get boring. Why not flying and running an business? If you study you have more chances in your life.
The aviation world is very unstable. I know guys who worked in the last 15 years for 8 carriers (mostly very recognized). None of them exist today, except one. And this carrier is shortly before being the next victim. They made it out before, but many did not. What is if you get the present of a wonderful child, and your company goes bankrupt? With an business you still have income for your family.
And: in my opinion, these guys who did some instructing before going to an big jet directly from flight school often - not always - handle them better.
Next to this there are companies out there who pay you for doing a 737 TR. Next to this: do you really want to live in Dubai just for a 737 flight deck? Trust me, a uniform is not everything in life. You will wear it for a very long time anyway.
I can highly recommend you, to study and get a FI rating. YouŽll also have the possibility to stay near your friends.
Cheers
LowPassGlider