If you want to go the El Cheapo route, household LED bulbs - the ones that look like regular incandescents - have really come down in price and will put out a surprising amount of light in a desk lamp, clamp-on shop light or chicken brooder light. Walmart sells a clip-on desk lamp that looks reasonably attractive which I'm using to light my 10g tanks. I don't have a PAR meter to test with, but with a 60w-equivalent LED bulb in there it's quite bright and definitely grows plants.
For plants you actually have a lot of choices. Anubias, Java Fern and Amazon Sword are the usual go-to. You can also do a lot of Crypt species, Dwarf Aquarium Lily, and might be able to get away with something like Dwarf Sag if you want a grassy look. Floating plants of course will also do well, or stem plants that can be left floating like Pennywort.