Questions about using Bias FX as a streaming rig

[Glory]

Hello there.

So, I had a few questions about getting a Twitch streaming set up off the ground and was hoping you fine folks could help me out.

I was planning on getting a speaker of some kind for my Bias and micing up that speaker with a Shure SM57. I was wondering, which speaker or studio monitor would be best for this? I don't have a ton of money, so (an) affordable speaker(s) would be priority here.

Also, which makes more sense for such a set-up? A loudspeaker? Or studio monitors?

On top of all of that, I was thinking about getting an 18i8 Focusrite so I can have enough XLR/instrument inputs for a second mic and my guitar. Is there a better interface I should be looking at for this set-up(I'm on a budget)?

Thanks in advance!