This. If you have no cofounder, and have no immediate need for the company to be formed, put it off as long as possible until there are reasons i.e. cofounder(s), hiring, launch, etc..
That is a question I have. At what stage should a company (limited or unlimited) be formed for a startup? If there is no company I believe you would have to do business with your own name, which doesn't look professional. All incomes and expenses would be treated as personal income/exp.
This is the wrong way to look at it. Your expenses prior to launch (with exception to employees and all), would be minimal (unless you're just outsourcing a ton of work). Hosting and a domain name is like nothing.
That said, until you launch, hire employees, have a cofounder, raising money, etc... no one is going to know you really exist and the "looking" professional or whatever is non-existant, nor do most early adopters really care or think that way.
The reason most people advise (including really good attorneys) to put off incorporating until you actually need it is basically to save you money and avoid having to undo, amend, or fix anything.