There are private IRB that you can hire. But they are costly. It would be cheaper to partner with someone who is in academia and use the IRB within the institution.
But truthfully, there are so many papers being published nowadays: what you publish will likely make minimal impact to anyone except your own ego. Instead of researching for papers, researching to create a startup is more rewarding intellectually and financially.
If you publish a review article in, novelty of your article wears off after 2 weeks. Great, you found that "XYZ factors are positively correlate with disease A": nobody cares because it does not really matter.
Instead of defending your novel ideas in front of a bunch of academic reviewers who spend more time writing grants than deal with real life issues, package your ideas and try to make it impactful in the marketplace instead. Reagents are widely available. For example, NYU-Langone rents out BioLab space where you can set up your biotech project. You can do your own gene knockout project quickly, but of course you are not supposed to inject those plasmid into yourself like this guy did (). If your idea is worthwhile, your startup can actually make you money. This is far more pleasing than to justify to academic reviewers who are mostly padding each other on the back.
As to the funding: assuming you are a successful doctor, you can easily outspend the poor PhDs who are having trouble with shrinking NIH grants. Make sure you invest your earning wisely (e.g. rental properties) that yield income that can fund your research. The initial loss from your startup is tax-deductible. Put your college-bound children in your startup so that they can claim credit for the works: it will significantly boost their chance for HYPSM entrance.