My well needs bombing once or twice a year.
If brown staining is an issue in toilets/sinks (browner than rust...), you likely have bactria that eat iron in your system. The bacteria secrete a slime that over time clogs the water pump screen and protects the bateria the cause sulpher smells. Both are not harmful to humans, but they can make the water tast/smell bad.
Bleach in the well once to four times a year will keep the populations in check. I used to filter my water, and after bleaching the well three times in 9 months, I am down to once a year (for the past three years) and no more filter (still a softner for some of the house though).
If your bad smell is only from the hot water, however, the sacraficial(anode) rod in the hot water tank may be causing the smell. My father in law removed his anode rod and it took care of his nasty smelling hot water.
As for sulpher smells, the boiling should kill the bacteria, and yeast creats a ton of sulpher itself, so I would not think a little extra in the starting wort would be too big of a deal for them, they are used to it, and most of the sulpher smell will off gas with CO2 perculating thorugh the fermentation, if it was not already eliminated during the boil.