Came across this list that rates home based businesses that could well be rewarding niches:
1) Cosmetics sales 2) Direct Sales and Mail Order Sales 3) Administration 4) Answering services
5) Home based accounting 6) Resume / CV writing 7) Translation 
Self publishing
9) Graphic design 10) Website design 11) Medical transcriptions 12) Costume making
13) Interior design 14) Child care 15) Craft making 16) Alterations and sewing
My best to you.