Why did they decline? When I applied, I was honest. Told them I only own a plotter, and it's a side business, and would likely buy a printer in the future... And they signed me up right away.
Since then, I've purchased another plotter, printer, and laminator, totaling 25K from them. The rep I deal with is awesome, and their prices have been consistently $1-2000 cheaper for each item I buy. Not everything is cheaper of course, but I've had great service (Including them holding the printer in their warehouse for about a month while I move). The only reason I can think of them rejecting you, is they think you're a hobbyist, and not a "business".