Best way to estimate a dev project for me is to establish what are the nice to haves and the must haves. A lot of times I’ll get a big list of requirements or a vague outline, so I need to figure what are our priorities.

If the project involves a new service that we have to purchase, then that project’s time estimate is one weekend because that’s how long it took other companies to implement per that service’s account manager lol 🤣