Adol, you are my Idol. : )
I am seriously considering dumping my ~150 cart collection of the "best" of the Super Nintendo (99% loose carts) to replace them with complete copies. It just really, really hurts my wallet to think about doing that. Also hearing your cost estimate of 30K really gives me a reality check.
I can see the appeal in having a "complete" collection but I don't really think I'll be going that route. I don't think I or anyone else will care if I have a complete copy of Barley Shut Up and Jam.
Earthbound on the other hand...
Anyway, enough about me. Congrats!!!