For product photography... If the product is not so meant for commerical value, ie you're not paid to do it, why spent so much???
I've taken good shoots on antiques using 2 cheap slave Morris flash mounted on a modified tripods. but of cos, required a light meter to measure before the shoot can commence.
As the morris flash cannot adjust power like a studio flash, simply use adjust using distance placement of the 2 flash or putting tracing paper covering the flash front to cut down the power.
Set full manual on the camera based on the reading from the light meter as if you're in a studio. For backdrop, I uses a Black Royal Velvet Cloth bought in Chinatown...
Morris Slave only cost $60 each and the mount, $20 and a cheapskate tripod abt $25 each.
Cheap Implementation...