With the economy in its current condition I would recommend NOT getting credit to finance- most start-ups underestimate the funds required to spin a profit and putting your family's home on the line could put you in a bad position.
You can get grants for free without signing-up for a memebership to some club, if you want to try the grant sites, most will give you a free or cheap trial to try their services. In reality, you can access the grants online or through community resources quite readily- the only thing that you really need is direction; talk to someone at the county- like in the business licensing office. They might have knowledge about such opportunities or someone who does. For example I really want to own a home and I just started looking on-line at homes in my area, then a real estate agent called me and I told him I wasn't a good prospect due to my current financial situation, he told me about a first time homebuyer's class in my town that entitles its "graduates" to receive money from the housing authority to buy a home- just being sincere and friendly will get you alot of info!
If you have a viable business plan that details short and long-term organizational goals, just get started, local grants maybe limited depending on your area, but start there and move-up to the county, state, regional, and national levels, finding-out everything that is required for all of the grants that seem like you might qualify- keep in mind things that can help you (maybe there's a program for families of recovering alcoholics, or familys with more then 4 kids or any number of other factors), expect to feel frustrated at times and spend a lot of time on the phone, just keep-up on all of the requirements and it will go through eventually. Good luck:)