Sound is sound. And if you sound bad it doesn't matter how well you sing or play. I'd ditch the 2x12 and go to a one in the same amp line. And perhaps downsize the speakers on the PA.
It's also about first impressions. If folks see a nice setup they will automatically think your good.
If you don't already have one get one of those fold down two wheel dolly to four wheel cart things. One with big wheels on the dolly side. Big wheels are a lot easier to go up and down steps.
The Roland StreetCube GX is a real winner for portability and light weight if you want a simple setup to run a guitar and vocals from one amp. It's not cheap, but it runs off 8 x AA batteries or mains and delivers 2 x 25Watts of power. I've used mine for gigs, festivals and busking and is plenty powerful to cover a lot of eventualities.
Hi Jimmie, late last year the band I played in was asked to reform for one special gig after many years of members being in different parts of Australia. Long story short...... we set up the stage as we always did, everybody's amp mixed into the PA......all except the bass player that is. He did not bring his bass rig this time, just a small pedal thingy that he plugged into and then into the PA along with the rest of us.
Every thing he needed fitted into his guitar case. I have forgotten what he called it now though.
Yep, it was a SansAmp now you mention it.