I'm a hobbyist/micro budget shooter.
I have been working as Sales for a camera store in Canada for over 2 years. (great discounts)
Over 2 years working, I have gathered some gear, however, never sold myself into a body. (now if I did, it would probably be a BMPCC and I'd most likely take your extra 9.000 and buy a Cooke variokinetal.)
I have purchased everything I can think of under the sun for a microbudget narrative feature filmmaking. But Coming from a student/micro budget "wokring on my own projects" filmmaker. I totally feel your need and want to get out an own an 'entire package'. However, I'd be more inclined (IF IT WAS ME) to put the 10,000 into GLASS.. More longevity and also a better chance to rent out, and renting out your gear is a great way to pay for more gear. or the gear itself.
That all being said, If you invest into lenses that cover 6k-8k (new sigma cine's) your probably set for life. as long as your happy with the lens itself. In comparison, putting $10,000 into a body, you might not be in the ball park to secure yourself a solid "life-long" body.
Cheers!