1, 2, 3, ... right down the line, your Project Description list reads like the script for my typical day. As an independent business finance and accounting advisor (the last 19 years) and, for many years prior, a CPA in the public accounting sector, I have assisted countless small business and emerging entrepreneur clients on precisely those start-up tasks you describe.
Having worked with a large number of start-ups over the years, I've helped many with those post-launch activities you mention as well, such as getting an accounting system in place, developing a budget and planning model, maybe getting a spreadsheet model up and running to track and analyze data; whatever the situation calls for and whatever system would be optimal for the client's unique scenario.
I'd certainly enjoy a brief discussion with you concerning the particulars of your situation. With those details in front of us, you and I could then set about getting all those points on your list checked off, and up and running.
In any event, best of success with your new venture!