The 2000 character limit removed the aim part... I just want to build a business for the sake of it. I want a good wage. I don't want to be a multimillionaire (but would be nice) - I just want security and the ability to work for myself.

With regards to making work more challenging in the day job, that's the problem. They aren't open to anything. It's all set in stone. Hell, I'm not even allowed to refactor or write unit tests. Unit tests here refer to manual testing checklists.