+1
i work in property development/project management which is a family business. i've also worked for many different companies and definitely prefer working for myself. i've come to realise that if your company is set up wrong then you will have nothing but long hours and a shitty working life. my first boss was like this. 30yrs old and running a multi million dollar construction/architecture company by himself while hiring backpackers to do random labouring and office work. it was an absolute nightmare, i had to leave to save my own sanity.
the last place i worked had it all going for them. great management, perfect filing system, neat and very organised and everything had a due date in terms of payments and invoices. it ran like clock work.
if you've got the critical operational tasks organised the rest will follow. you'll make your own business logic that flows from that.
p.s. keep a day-to-day diary.