Hi Nub,
From reading your case I can see that you've the lust for a new camera
I've always ended up with the same problem, recently with Drones (DJI Phantom)
I love photography and really wanna try the new trend of drone photography, but than again I've lack of time and object (since I live in a small city)
That is why, from worthy pov I retracted my intention
Now to your problem, I might suggest you to see it from functionality point of view
Does spending on a new camera would tripled the quality of the result? IMO photography does not rely 100% on most expensive camera, BUT I can also assure you a good camera would help a lot
but it's the play with lighting, ambient, moment and object
so if you have products to showcase/sale like your keycaps (which I adores dolly so much), yes a new camera would help
if no, you still have obligations to do, unless you get a huge bonus at the end of the year

one last thing, how about waiting for boxing day? still half a year to go and dont you Americans get crazy discounts at that time?