Moreover, I think a cofounder would serve you very well based on some of the things you said. (Granted, with few details of your actual product, I could be completely wrong.)
"I would just need a large server" - Another technical cofounder could probably help you with the real scaling problems you will have if you get traction. And sadly, in most technical products, simply having a large server is not enough.
"I would need ... some graphic design company to design the logo and images. I also would need a ad company to create a name" - A creative / design focused cofounder would be of really great use. This is going to cost you a lot of money you probably don't need to spend.
"I.m looking for I think is around 100k." - A business knowledgable cofounder could really ground you here. A VC would not do a deal this small. That is not interesting to them at all. A seed investor, angel, super angel, whatever they are called might be interested but it would really help decide to invest in you if you have someone that has a real grasp on business projection and how much money you will really need.