You realize Roots Excelurator isn't just a beneficial bacteria? Actually that is just a small part of what it is. I use Great White for my beneficial Bacteria, Mycos, and Trichoderma. For the Price Roots Excelurator is actually cheaper also to mix per gal because Roots Excelurator uses 1 ml per gal. Voodoo Juice is comparable to what you mentioned but Advanced pulled their product that was comparable to RE off the shelf because he said he couldn't make anything that compared too it.
Mighty Crobes is about 5 cents more per gal to mix so in the long run that will really add up. Plus they aren't very similar.