I do run Bioactive setups not for BP but I can still offer guidance on that.
You can do it yourself for a lot cheaper than the biodude IMO, the key is proper substrate, plants and I will not lie BP are heavy body so you will need some plants that are not easy to kill or will re-root if crushed and of a good course cleaning crew.
For substrate I recommend to mix top or pointing soil make sure nothing is added to it, coco coir, sand and litter leaves.
Plant I recommend Pothos they are hard to kill
Cleaning crew I recommend Dwarf whites Isopods and Powder Orange Isopods
You will also need a frow light bulb for your plant.
Now would this work long term or if you had a 4000 grams BP? I think it would be difficult due to the amount of waste produced, smaller species however it would be a different story.