For the volume of stuff you're toting around as a copier tech, I agree the first-gen Insight would leave you wanting, though its fuel economy will leave you breathless compared to your Accord.
The second-gen and beyond Prius would be a better bet. I've tried the second-gen Insight and it's a nice enough car, but it's still pretty small. The Prius provides quite a bit more room inside than the Insight that resembles it, but I can't determine whether it offers fold-down rear seats. I don't think it does, but I believe the Prius V does, which may be a better choice for you if you have to move a lot of stuff around.
I found these:
Toyota Prius V Std | eBay
That's a 2012 V with only 60,000 miles on it, factory certified at just under $20,000
and this:
Toyota Prius V Std | eBay
That's a 2012 with only 30,000 miles, asking $21,000.
Both those cars are in Georgia.
Closer to you, I found this:
Ford Fusion Hybrid Sedan 4 Door | eBay
A 2010 Fusion Hybrid - very roomy - under $14K and less than 80,000 on the clock.
Also worth considering at some mileage penalty:
Ford Escape Hybrid Premium Sound Alloys Cruise Control | eBay
That's only comparable to your Accord at 29mpg highway but you pick up a lot of interior room for carrying your equipment and supplies. It's under $9,000.