Cut it short, fly to India (you must if you want consistency), create good relationship with one of the factories in Chennai as one of the largest temples is located there (you must create a good relationship, that's how things work in the east (I'm from the middle east and I know), hand pick and buy around 10 KGs and ask him to always provide you with similar quality.
Then it's all about you being able to sew the bulk hair into wefts, clip ins etc.
For wigs, always create a good relationship with a Chinese factory, preferably one of the most common like Rex (junpengwigs), Holly (wigsandclosures), Jacksun (shuangyewig), KevinCN (I lost his contact he was the best
) and Tony Zhang (qdpremierwigs), send them the hair and they'll sew it into a wig, Chinese are best in handicrafts and wig making.
Talk to them politely (especially the Chinese) if you don't they won't take you're business seriously. Use more formal polite English, similar to people with English as their second language (like me), they like it more, that's how you make a good relation with the Chinese Vendors. They can make your wigs, skin wefts, closures, frontals etc.