I too bulk load my film. It allows me to roll short rolls for particular projects. Indeed you should check if you are saving money; sometimes sale priced film will work out much cheaper than bulk-loading, however I have always purchased my B&W in 100ft rolls and it has always worked out cheaper for me to do it that way. With a never ending supply of canisters from my contacts at several photo labs (plus some saved older style "pop" top film canisters), I have more than enough to last me quite some time.
I picked up a used Watson loader for about $10 many years ago when I first got into B&W photography and also used it to bulk load Agfa RSX film about 10 years ago when I took a long sabbatical to the UK, US and Europe. (Ran out, but managed to clear out a pro lab on Shaftesbury Ave which just tided me over!)