Rosetta under Yosemite?

Is there any simple way to run rosetta under Yosemite?

If not, am I correct that Snow Leopard Server will run on Parallels (and it seems this is the 'legit' way, I'd like to be 100% legal), and that would solve my goal of hanging on to some PPC apps without the constant need to reboot to other drives or use multiple machines?

I'm running a mid-2010 Mac Pro, and need higher than Snow Leopard to run the new TurboTax, but wanting to hold on to an investment of $$ in PPC-only apps.