I agree with Ken that teaching yourself is not a good idea. If you can't find the specific art you wish to study taught in your area, picking up a different art would be a better idea. In other words, Kendo with a competent teacher is better than Iaido with no teacher. It would surprise me if the Kendo school didn't do any Iai ever; Seitei Iai is within the repertoire of Kendo training, and there is also Kendo Kata, which is related.
Another option is to brace yourself for a 90+ minute drive (each way) to and from Charlotte, NC a couple of times a month.
Lastly, you could wait. When the student is ready, the teacher will appear, as they say. Exercise regularly to keep fit, and...if it means enough to you...get ready to move your practice to Seattle, San Francisco, or New York someday.
Yours in Budo,
---Brian---