Keyword researcher & Description writer for T-Shirt Business

HI
I am looking for someone who has experience in researching current good selling shirt niches. (Example good BSR at Amazon) Based on this research you should provide ideas for shirts with example links. Next task would be to research 15 good low competition or good selling keywords for each shirt. You should be able to write good selling descriptions and titles with trademark checked keywords then.
Workload should be around 30 good researched Keywords texts a day, provided as a csv with links.