Hi,
Welcome to the board!
I've not made a parm before, and only one romano (which is now over a year old, but as of yet untested). However, my understanding is that lipase is not essential, but you will get a different flavour. I think you could add some goat's milk though. Say, 3 L cow and 2 goat?
And yes, the yogurt will work fine for a thermo culture.
- Jeff