1) Tesla's battery day in September 2020 [0] highlighted that, among other things, battery cost and production was going to become a huge focus for Tesla in the coming years, and as a result, a $25,000 Tesla car could be feasible.
2) I don't know if production costs in China are substantially lower, but assuming a large scale of operations, they should be somewhat lower than in the US.
3) I have a lot of faith in Tesla's push to improve manufacturing by building large, unique machines that simplify dozen of individual steps performed by dozen of robots into a few steps performed by a huge machine - while saving costs and time.
4) As a result of its stock skyrocketing, Tesla secured approx. $10B in new cash. That's plenty to make large investments, and move fast.
I would bet that Tesla will manage to start delivering a $25k, 250 miles range "cheap" sedan (model 2?) by mid 2022.
[0]: https://www.cnet.com/roadshow/news/tesla-battery-day-model-s...