I'm currently using a cheap point and shoot. I'm intending to buy a Nikon 35mm lens and a DX frame camera. I have a need for just a few months to take some close-up shots of model soldiers to post on ebay. Like the photo below. The models are approx. 20mm high. The photos don't need to be great quality but I'd like to do better than the shot below to show the detail better. I won't need it for long, nor for anything else, so would like to keep the cost down. I'm wondering if I should buy some extension tubes or macro-conversion lens or something else? Needless to say, I don't know what I'm doing here! 
Help!
Steve
View attachment 40326
Help!
Steve
View attachment 40326