Rich - Dan's suggestion is fabulous - if you can simply continue the trusses along the gable in on direction to make the space wider that's a great idea and probably the least expensive - poles, trusses, and steel for three walls and a roof, instead of four.
The more shops I see - the more I think it makes a great deal of sense to separate the shop into pieces - for us northerners - less to heat - but for everyone - it's nice to keep the "dirty work" separate from the clean work - or just have storage in part of the building with just the essential lights and outlets, and keep the working space free of "storage" items.
Check on codes, set backs, etc, and see how much more building you can get away with...
The more shops I see - the more I think it makes a great deal of sense to separate the shop into pieces - for us northerners - less to heat - but for everyone - it's nice to keep the "dirty work" separate from the clean work - or just have storage in part of the building with just the essential lights and outlets, and keep the working space free of "storage" items.
Check on codes, set backs, etc, and see how much more building you can get away with...

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