In my own opinion....
go with router 1st. I think you would turn a profit much fast with a CNC router than a laser at the out set. though the learning curve may be a "bit" longer. Even if your not selling router cut items specifically, it will help your shop be more efficient. i.e. cutting sign shapes/profiles, lots a repeat parts, cleaner more accurate cuts etc.) Which will turn into Higher quality, faster turn over, faster payment.
Then once you've made a nice chuck of change, you can quickly pay off the router. or go get the laser and get into the custom gift biz...
Good Luck!