^--- I get about 18 rolls of 36 exp. But I load 30 exp. rolls to reduce the probability of scratches, and because with 36 I always seem to end up with a couple more frames than fit into a storage sleeve.
The savings you see depend on the film.
If you shoot Legacy Pro (rebranded Neopan 400 and Neopan ACROS) from Freestyle, I'm not sure that the savings are worth it. Legacy Pro is already under US $2 a roll, while bulk-loading Legacy Pro is about $1 a roll, plus the cost of cassettes (reusable maybe 10 times, +/- a few), plus the cost (amortized over hundreds or thousands of rolls, of course) of the bulk loader.
Not all films are available re-branded from Freestyle, though.
For TMAX400, for example, bulk loading cuts my cost roughly in half, from $5/36 exposures to ~$2.70. That is *definitely* worthwhile. Savings on the Ilford emulsions are similar to those on TMAX. In the U.S., I'd pay $5-6 a roll for 36 exp., and a 100 ft. spool is $50-60.