Rather than just a standard affiliate site…? If you have the time...? Set up a forum try and get a tie in with the manufactures, distributors, shops (offer advertising in return for model kits, or chance for your members to visit there factory etc these could be offered to people that join your site do the most post etc helps build up a forum quickly ).. or publishers that do modelling mags in return for advert in there mags you allow advert on your, Hit the social network sites, clubs , forums etc, People can show kits they have built, rare models etc build up a buzz around it, Best model each day, week,month (different age catagories gets in young and old..) , could win a model supplied by one of the manufactures, Once you can get enough forum members start on sponsored pages for model of the week, paints, glues all associated products, mail shots offering members cheaper model kits etc then take a % straight from the manufactures etc If there is the sort of demand the search volume indicates you could quite easily net £ 500 + a week within a very short time, if you market it well get enough members in you could do very well.
Its a good net product that in the main is cheap to produce and light enough to post