I'm an expert in video animatoion and 2D animation.
I am answering all your queries here, except the video links which I'll surely share in the inbox (due to privacy issues)
1)For 8-10 minute I'll charge around 20,000INR (2000 per minute)
2)I prefer motion graphics for explainer videos.
3)I'm making video for more than 2+ years.
4)It will take me around 7-10 days for a single video with voice over and script provided.
5) I'll share them in inbox for sure.
I'm looking for some long term clients,hope to listen from you soon.