How many searches per month is considered the bare minimum to try and create a niche site around? lets assume little to no competition would anyone consider creating a niche site around a long tail keyword with 1000 searches a month? 10.000? if you are ranked 1st in google for a keyword searched for 1000 times how many visitors could you expect to get?
I would say bare minimujm 1500-200/mo. This would probably be very focused and if you have a product of your own or an affiliate product that matches what the searcher is looking for it could be a great thing!