As mentioned previously in this thread, there are a few lab breath analysis, specific for testing SIBO.
I inquired about self testing at the Great Plains Laboratory. This is a very reputable lab which many physicians use. They do have a 'program' where an individual can order some but not all of the tests without physician/clinician involvement. Well sort of, because there is % surcharge w/o physician order, no surprise here. But they do show the pricing.
From their home page
http://www.greatplainslaboratory.com/home/eng/home.asp , click on 'For Patient' link on left. Then click on 'MyMedLab', and finally click on the blue MyMedLab link in center of page. On the left lists all the tests you can order. My understanding, the price includes a consult with the laboratory explaining the test results, although I would verify this.
Here is another cheaper option. If some of you are interested in an analysis of your gut microbiome, there is a lab which actually encourages self ordering.
https://ubiome.com/
The cost of this stool test is dirt cheap. With promo code (via google search), the price is halved ~$90 for 2 separate tests, taken at interval of your choice. However, unlike other stool tests, this one does NOT include candida/mold markers, so keep that in mind.
I also started taking Prescript Assist, AOR Probiotic-3, and Saccaromyces Boulardii. If these do not show any significant improvement, my next approach will be definitive lab work. Going the lab route = no more guessing.
**Worth noting, most reputable labs do require healthcare/clinician ordering, but in most cases does not have to be a certified PHD. The standards for who orders the testing is very loose, depending on the state you reside. Also, most of these testing labs will provide a list of local physicians/clinicians who frequently use their services.