An optimized Windows PC for audio + a decent audio interface can make a very reliable setup.
We have a guide as well: FREE e-book by Deskew - Optimize your Windows PC for the stage!
Also, check out the Gig Performer in Action category to see many guitarists and photos/videos of their setup 
For example: these professional musicians are very happy using a computer with Gig Performer, let’s name a few:
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And the best thing is that this community is very friendly and helpful.
Welcome 