How to Develop an Auto Training Bot?

There seem to be many API providers like Helius and QuickNode, even with a quick search. But if I want to actually track wallets and build a copy-trading bot, which provider is the fastest and most capable of handling features like wallet tracking, price checking, and executing buy/sell orders?

Also, what kind of features are essential for building such a bot?

Or, are there already reliable and affordable bots available on the market that I can trust and use?