But to have credibility a trial would have to be done by researchers who are not connected to Dr Markov or his clinic. This would be expensive.
I don't think that's entirely true. While that would be ideal, Pfizer ran the experiment that tested the Pfizer vaccine, Moderna did the experiment that tested the Moderna vaccine. Some of those trials had independent investigators involved, some did not.
The same with various IVD testing. The applications (for both regular approval and EUAs) are usually based on data submitted by the company applying for approval and reviewed by the FDA.
In this case, we wouldn't be looking for a Phased clinical trial - that is not practical. The goal would be enough verifiable information that a pharma company or funding source would be interested. Something beyond, "Trust me, 93% of our patients recover." The same thing is said by the DNRS community.