IMO, bleach bombing every few batches is ridiculous. If you're that paranoid of infection, there are better options. There are some things that will survive pouring boiling hot water into the bucket. For one thing, unless you actually fill the bucket with water from a HARD boil, and it's warm enough where you are to keep it there for at least several minutes, you're not doing that much. It won't do any better than using Star San. Plus, having that much boiling hot water right there is a bit dangerous.
For my fermenting vessels, I could simply put some water into them, cap and fit the gas post (I use adapted sanke kegs) with a relief valve assembly (with a pressure set release) and boil at a higher pressure (think, 7.75 gallon or 50L pressure cooker) and kill anything that could be in there. 10-15 minutes there should be enough, but I could also go for a 30 minute pressure cook. Thankfully, I've not had a single infection to date. BUT, I wouldn't have any issue sterilizing my fermenting vessels and tossing out any plastics that came into contact with the batch. I'd probably either toss any silicone hoses out (I have a good amount of 'spare' on hand) or include them into the keg boil.