I think the startup price will depend on what project do you want. I dont understand the complex part but i think you need at least 500$ on a home base project and some people. Idea and trusted people are much more important than the fund. When you are going to implement your project online then you will need to acquire people awareness in order to work it. Just make a feasibility study in order to have a higher chance of success. Its not how large the money, its how large your idea.