How much does it cost to build a bot?

I'm curious about the cost of building a bot for cryptocurrency trading. Can you give me an idea of what kind of investment I might be looking at? Are there any specific factors that can impact the price, such as the complexity of the bot or the features it needs to have? Additionally, is it more cost-effective to build a bot from scratch or to use a pre-built one? And what about maintenance and updates – are those costs included in the initial investment, or do they need to be factored in separately?