Well, if you're an artist, there actually is an 
easy way to make spare cash--do fanart or fanart 
commissions on ebay.  

It's what I do, because my university schedule 
doesn't allow me to have a part time job that 
would be worth the impact on my grades (but I 
work full time during every vacation I get to pay 
my tuition).  There are so many college kids 
around here looking for jobs you can't make above 
minimum wage anyway, no matter what your skill 
level, so art is actually a good alternative.  

So just look up 'fanart' on ebay and see what I 
mean.  If you're good enough, you can sell stuff 
on ebay and people will contact you about direct 
commissions--I just finished an 18x24" cel 
commission (fifi from Tiny Toons) for $100.  But 
even quick watercolor paintings and stuff will go 
for at least $10 each.  

By the way, I think considering selling a pet to 
pay for a piece of plastic is reprehensible, but 
then, if you'd actually do that, the dog is 
better off with a family that loves it.  

So get your priorities straightened out and 
figure out how to get your talents to work for 
you.  If worst comes to worst and you can't sell 
anythin, you can just learn how to paint cels so 
you can have all the cels you want, just not 
authentic ones.