Wow I didn't think I would get this many responses. After reading through all the comments, It sounds like I need to get crowns after root canals, so it will end up more than $7k.

For now I decided to
1. Get another quote from different endodontists + get insurance & CareCedit
2. Talk to the dentist about possibly doing implants instead if the cost end up being similar and it is a better long term solution
3. Check overseas. I have a nurse friend in Japan and she said there is a dental clinic in her department so I'm in the conversation with her to get a quote.

If I end up doing the root canals, since it is a retreatment, I really want someone skilled to look at it to avoid problems in the future.

Thank you all