nfs cluster questions

I'd like to use one float IP that exports multiple ext4 file systems, I got that working, but only when all file systems are created from the same VG.

is it possible to create different VG and share the same IP?

if that's not possible, the VG would be around 25TB, could the size be a problem?

if it's possible, please point me to the right direction how I could implement this.

thank you!