I am a software engineer looking to start providing shopping cart integration and development services to eCommerce businesses but before I get started I want to validate that there is a need for this type of service.

If anyone can help me by answering the following questions for me it would be a great help.

1) Have you ever paid for anything like this?
2) If so what is a typical (ballpark) budget for a project like this?
3) Is this a high priority for you?
4) What factors are the most / least important to you when deciding who to hire?
5) What has been your biggest frustration with people providing services like this in the past?

Thanks in advance!