To be frank you really don't need a whole lot of cash flow for an online business, unless you need to stock your products at a nearby warehouse. Otherwise, if its service oriented you can subscribe to have your website built and registered, thus incorporated with e-marketing variables. This will structure and set your potential client base with emails and website "tease" marketing programs to generate your word of mouth. see (
http://www.nvmarketware.com) This company Net Village has extremely affordable rates to get you started and an award winning design team to help you along.
hope this helps...
mapple