Ok so Im thinking of using a Behringer kx1200 120W keyboard amp for my guitar.
I have been told I will need a pre amp.
My questions are:

1. What is the cheapest pre amp solution that will do the job?

2. The manual says that the line in for devices such as guitar has a balanced input impedence. But all my guitar leads are unbalanced. Will this cause any problems? If so what?

3. Am I better off just getting a smaller. 50W guitar amp? Opinions please.

Thank you to anyone who helps my dumbass out.