Technically yes, but one person's macro is not another's.
If quality is not paramount, you can get cheap +10 diopter kits like would be used on a still camera, eBay could find you some under $50. Otherwise you could talk to a rental house about renting a real lens.
Depends on how wide-angle you are. You can easily focus to the surface of the lens if you're in full wide-angle. For telephoto, I don't recall (don't have my HVX here to test) but I think it's about 1.6 feet or so.