If you can throw $10'000 on glass, but you cannot justify spending more than $500 on a body, then you are being unreasonable. APSC sensors are only using 40% of the L glass potential. Even if you only got 3 or 4 lenses and use them / love them equally, then each one will only get a quarter of your attention, while the body is used for 100% of the time. If you worry so much about the resale value, then why not buying used bodies? I'm sure about one thing - I should have bought a used 5D with 50/1.8'II instead of a Rebel with some zooms (for the same price). Yes, I'm not one of those "covering the range" people.
I think that there is a conflict between two topics - "lenses before body" and "FF vs Crop" - which shouldn't be merged. However, when they do merge we get "$10'000 of L before FF" which sounds like "marriage without sex", or "FF with only $8000 of L" which sounds like fun (and the right way to do it), or "FF before any L" which sounds like "sex before marriage" (kinda fun too , for a hobby).
I don't think I was saying you should never upgrade your body... but with limited funds and the presumption of good light, you will be better off with a crop sensor plus s good L lenses versus a full frame and a 28-135.
Not to long ago a guy was asking if he should get a5d mkiii to pair with his 70-300... and everyone but me said Heck yes... I don't know if I'm clairvoyant, but I eventually got it out of him that his lens was a 75- 300, which is one of the worst lenses canon makes.
So with the money, I'd rather spend 3000 on a 24-105, a t3i, a 70-200 f4L IS, and a 580 ex ii over the full frame alternative. And with my math... I still have enough for a tokina wide angle or some nice primes...
Full frame is great... but you really should have some lenses to complement it.
As for resale value... yeah... that's the only way I can afford being in photography.
If I buy a lens for 1000, use it for 3 years and then sell it for 850, then I rented the lens for $50 per year... which in my opinion ifs well worth the effort. But more often than not, I buy a lens for 700, and sell it for 850... so they pay me $50 a year to keep their lens warn and in good condition. And I'm happy to oblige.