It will surely depends on where you are located. In Canada, you can ask the 2 employees/contractors to provide you a bill like any company does when they sell services to customers and you can pay them by check. The employee/contractor would need to be registered as a company (incorported or regi...
It depends on how your going about marketing yourself. It will have no effect on organic SEO, however if you are marketing via TV or radio where people have to remember and then go to the computer and type it yes most people will falsely remember .com and not .net. The tradeoffs could be minimal...