How to start an online baking store type thing?

[revsuzanne]

Yes, but websites are not that tough to do these days... some you just pay for the hosting and they have online building tools that write all the code. You might be looking at $25 a month for that. Given that it will bring in business, it is just part of the cost of doing business.
You might start with a small ad in subdivision newsletters in your area.
You could also do half page flyers and put them in boutiques, beauty shops and the like with permission from the owners. Bridal shops would be a good target.
Business cards will also do... order them from VistaPrint for like $5... put a photo of your baking on the front. Get a rubber stamp made with a discount coupon you can stamp on the backs.

Something you might consider... gluten-free breads and cakes. There are a number of wheat flour substitutes, like Paula's flour and the like. Stick with simple recipes and it will good.