So my name is taken as far as usernames and websites go so I want to replace the s in my last name with a z and just go by that. For example: Dave Herzberg instead of Dave Hersberg. (Not my real last name.)
Which then will give me… www.daveherzberg.com + usernames.
Will misspelling my name matter at all in terms of business?
If the problem is usernames no matter what you do, good luck. But consider using alternative website domains extensions to get the website you need. As an American, I can and do use www.lastname.us because I find it much cleaner than anything else.