Making money drawing only requires a talent for designing and now there are quite a few websites out there that cater to the artists and designers who make online businesses out of creating designs that get printed onto T-shirts and Coffee mugs and other gift merchandise, this is called print on demand technology and the market leader is Zazzle with it's easy of use and fairly straight forward image uploading interface.
Zazzle has an affiliate program built into the site, so when you sign up for an account at Zazzle , you an start to also promote others designs and art there too and earn as much as 15% commissions, plus volume bonuses too and extra dollar incentives, which always is a good idea, particularly if you set yourself up in a niche of selling business cards and other related stationery and party invitations, then you could promote others designs in this area too. Of course there are other print on demand websites to look out for like Cafepress, but always read between the lines for sites that will match your own interests, I did an article over on Hubpages about 12 print on demand sites and you may find them interesting to form the basis of your own design business online, Check them out here - 12 Print on demand sites