I normally don't worry about the background when I take pictures of receipts or collateral material as the background is usually a table top. I never use the flash. I try to set up near a window or use two lights at 45-degree angles for even lighting.
What is the resolution setting for your scanner [how many DPI]? That will affect the speed of your scanner. I once scanned a 35mm slide at 25k DPI [yes, 25,000 dpi]. The scan took about 3 hours, but the result was an image that I was able to have printed as wallpaper for a client.
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Have PV-500 & willing to travel.
"Answers are easy. It's asking the right questions which is hard." (The Fourth Doctor, The Face of Evil, 1977)
"Somedays you're the pigeon, somedays you're the statue.” J. Andrew Taylor
"I have never met a man so ignorant that I couldn't learn something from him." Galileo Galilei