Spend it on multi time and IFR experience flying non prec GPS/LOC approaches in and out of small and big Airports. That experience would be more valuable. When you get to the Airlines and you want to teach ie.. Check Airmen etc..you dont need the CFI. Or go fly cargo for a little while in Barrons, Chieftans if possible and gain both for no money.... Im not saying the CFI is worthless but you need a return on your investment. Unless you can instruct on a regular basis in ME A/C I would go a different route.

And yes I have all three ratings...