I don't know if the SBA looks down at the industry but they are like other banks. They look at what is the market value of the business should it become defunted. For this reason they do like franchises because a Franchise is easier to sell because the Franchisor has a brand, proven business model and system.
You should have a business plan at some level of sophistication. You can meet with SCORE and have them coach and review the business plan. They likely will have you work on it,revise it and repeat then add more to it. Once that is done, they will likely look at your potential and needs then hook you up with a banker. Expect a small loan if any.