Taking on Obligation is not a stupid choice. I think you are viewing obligation as harsher than it really is.
Also remember
Light blaster pistol 5 damage 300 creds only 2 less damage than heavy blaster
heavy clothing 50 credits +1 soak
Use cover to give you +1 setback to those shooting at you.
Cover with heavy clothing is the same effectiveness as Armored Clothing 1 soak 1 defense(setback die to an opponent's attack)
So you can have a blaster some armor and a utility belt 25 credits, Comlink 25 credits. that is 400 credits. you still have 100 more and every starting group gets a ship.