15.01.2013, 04:23
It doesn't matter about the slots. It matters about how many players are occupying those slots. I believe a 100-slot SA:MP server that is fully occupied 24/7 will use about 2 TB's of bandwidth per month. I could be WAY off though, so don't take my word for it.
Your best bet is to find a VPS provider who offers un-metered/uncapped bandwidth.
Your best bet is to find a VPS provider who offers un-metered/uncapped bandwidth.