using 'not enough data' keywords with a ppc campaign?

[phil9922]

i have been playing with the adwords keyword cpc estimator trying to decide a niche for my first ppc campaign. i have an idea that i think would be popular, but the market is already saturated, so i came up with a huge list of longtail keywords. Most of these keywords return 'Not enough data to give estimates.' with the average cpc tool. Is it worth it to pursue keywords like this if i have a lot (probably 500ish) to use? Here's an example of how i was planning on grouping them and what the keywords look like.

Adgroup 1:
white shirts with red logos
white shirts with orange logos
white shirts with yellow logos
white shirts with green logos

Adgroup 2:
black shirts with red logos
black shirts with orange logos
black shirts with yellow logos
black shirts with green logos

Adgroup 3:
gray shirts with red logos
gray shirts with orange logos
gray shirts with yellow logos
gray shirts with green logos

etc,etc. With this niche, i have created a list of about 100 different adgroups i could create with 3-4 similar longtail keywords in each. Since i have never ran an adwords campaign before, i don't really know what they mean by 'Not enough data to give estimates.' I assume this means there is a very low search volume for the keywords, but i guess my question is, with such a large # of adgroups and keywords possible, could a campaign like this be profitable?

 

[moores29]

Well im assuming these are not often searched but consider a few hundred clicks/month @ 500-is keywords can add up+ if you get ok quality score i would wait and see how it does

 

[Mahzkrieg]

be the big fish in the small pond and go for it.

if only 10 people search for one of those long tail a week, but you cater right to their fucking doorstep and convert them all, you're still in the positive. make sure you're going for exact matches.

 

[maximus]

Yes. The cpc estimator is not very accurate.