Page 8, you've spelt "ensurance". Should be "insurance". Despite paying the insurance, in order to claim on it you would have to close your company down.
Your comment on page 17, that an AG is a "real company" is inaccurate. GmbH's are real companies - even with one employee. You've also failed to point out the benefits of limited liability (AG/GmbH) over Einzelfirma.
MWST can be paid 6 monthly. You can register for MWST fixed. For a 1000CHF invoice, you pay 1000*1.076*0.06 = 64.56CHF, instead of 76CHF. You don't do any other MWST accounting, and claim none back. Excellent if your MWST invoices are considerably higher than your MWST expenses. Also reduces accountant costs.
I pay AHV/AVS monthly.
Work out how many weeks holiday you want a year, when you calculate how much income you want - this helps determine your minimum rate. It's important to budget for proper restorative time off.
Even if you get direct contracts, if they last a longer time, the client may insist one-man GmbH go via agency. However, the margin will be considerably lower than if they find you work.
Page 28 has grammatical errors
Also, with agencies, watch out for handcuff clauses, and get your contracts checked by a competent lawyer (100-200CHF per review - could save you 10000s). And negotiate!
I do not recommend all-in-one printer/scanner/copiers, unless space is an issue. I do recommend a fax machine.
With Labour license, some cantons waive the need for one-man bands. Others require you to get a waiver from the competent authority.
Probably I'd mention more about compulsory/advised insurances - accident, sickness, professional indemnity.
Mention the Swiss performing rights organsiation - they like you to give them money. And also that as soon as you're registered, you'll receive bogus bills for registration.
btw - I work far shorter hours than I did as a permie.