It appears that perhaps your wife and mine are something like kindered spirits! It was VERY difficult to get MY wife to going along with the idea of spending quite a few thousands on my current setup over the past two years!
Your best bet perhaps would be to get a tabletop "studio" that folds up and is made of white nylon cloth. Three speedlights would be Ideal. Place one outside the box on each side, and perhaps one on te top. Most of these studio setups come with several backgrounds, black, blue, red, or other colors.