Though our SBS is the Premium edition, its current use is only file, print,
and Exchange. Can I therefore use the Standard TP (around $1500) instead of
the Premium TP (almost $3000)?
If it's of any value, the reason we're considering this move is to provide
server mirroring to an offsite target via DoubleTake. Officially, DoubleTake
does not support SBS failover. Unofficially, they do, but with cautions and
conditions that our system does not satisfy.