I play acoustic guitar & keys as a solo performer. I can play acoustic guitar alone, keys alone, use full Arranger function, or sequence a tune on the keyboard & add live acoustic as shown in this picture....Sitting down is more comfortable & adds continuity to how my workflow is...

I have 2 guitars on stage as well.....

[url=[URL=http://s1090.photobucket.com/user/Alinaaltonian/media/Picture%20Singing%20at%20Church.jpg.html][/url]]On stage set up[/url]