Help finding solution for either a webhook or automation

This sounds complicated enough that it will need a script to automate.  Even if you could automate this with a few webhooks, if these records get imported, I think that you would end up exceeding the rate at which webhooks can fire, which is a rate of 10 per second.

If you contact me via the information in my website, I can recommend a couple of QSPs (Quick Base Solution Providers) who could do this type of work.