[raintrees]

My experience has been "any time." There are always pros and cons, things will always arise, time passes. Best time to plant a tree is 20 years ago, next best is now.

Now a specific product or service may be much more impacted by the market it will be in, so that requires forethought.

And a business can be "a job" or it can be an entity one plans to eventually sell, with or without others being part of it (partners, employees, etc.).

Financing has also changed quite a bit, my ventures have been frugal, so that is my experience.