The implementation of AI search auto brands.

Need, in a sense, the bot that will index a specific list of sites to pull the names of brands of cars, their characteristics etc. and write to database.
The bot should be smart, namely to get the data from Html osprey smart way, not hardcoded. In other words, if in the future I want to add other sites, it without any problems and corrections needs to get the data from there.
All the details ready to discuss with the contractor. You approximate cost and timing and what technologies are ready to implement the bot.