You would be building that for years. With a spray can, I think a good looking space marine takes 30-45 minutes to build. Now think about how many are there... You'll be doing it for years.
Upsides though, you'd never need any more space marines, it is technocally a deal, and you've got a good 5000-10000 points total. I don't feel like doing all the math, I like my head unexploded