#2
It will work if you have an 8 ohm output at the fender.
But just don't do it, it won't really sound any louder or better.
You can find some better ways of spending 250usd.
#4
my main reason for doing it would just be simplicity. right now at gigs i am running my fender into another 2 12 combo amp and it would just make it easier to have less buttons and knobs to mess with during set up