Ok, welcome to the world of living skinny. If I was you I'd get a good 2x10 and an older Peavey that can biamp. Save the real money for more important things. 3K on a rig is a waste at this stage.
You could look to work with older guys who make money on the weekends. Jazz, rock, blues, pop, doesn't matter so long as it's paying and letting you see the real world from a stage. These older guys I'm thinking of have figured out less is easy to sound good and load in and out. Win. It took Clapton 25 years to figure it out.
So, you like composing and heavy stuff. Tough market. Presumably you're splitting those interests into work and work/fun. It doesn't sound like there is a need for a rig next week. Cruise the TB world for pearls of wisdom.
The rig I suggested lets you get loud with a subwoofer or a big PA. Add another 2x10 on a big stage playing to hundreds and hundreds. You want to avoid 100w Marshall guitar stacks at bar gigs.
There are many ways to record bass. With all the computer based processing tools all you really need is the DI for starters. If you have serious investment in a particular tone for a project then there is always a rig to borrow.
IWNBARMPB Prezident, Team Trace Elliot #1, Mediocre Bassist #399, Old Basstard #86, PBBBC #2