Sven Wagener wrote:
How much extra time would be reasonable, if I don't want to work every single day for the next, e.g. three/four months?
Count the days you calculated taking business days only (leaving out weekends/holidays and any day you wouldn't want to work) (i.e, you have at least 8 days a month that correspond to weekends, so add this to your net calculation)
Second, when writing the offer, would you write an overall offer for the project, or would you state deadline, price for every single booklet, leaflet etc?
This depends on how the client wants it and wants the material back. As Alison suggested, ask the client.
Third, are there any good sources, which give me an idea how to write a really professional offer?
This also depends on how you sort the second question. But as a general rule, you'll have to include your details, the client details, the job details, estimated time & cost, payment terms, terms of service and all the details that you consider relevant for the other party to know/evaluate.
Hope this helps and you get the job!!
ps. given that it's a big job, don't forget to aks for advance payment and/or several payments, or you'll have to wait for months before you see any of your hard earned money.
[Edited at 2004-11-09 13:58]