Its really tough out there in FI land at the moment. The Flying school I used to instruct at has seemed to pick up recently with the amount of students, but guess what - most of them are FI students.
There's going to be more instructors than students out there soon
If you do get the FI rating odds are that if you're lucky you might get 3 or 4 hours a week out of it as a part time FI.
I would say do yourself a favour and be realistic, if you've got some contacts which are likely to help you get a job then fine but if you're just doing it in the hope that you'll get lucky then I dont think now is the time, the odds are not in your favour.