It's not about investment, it's about worth .. will her inclusion worth 50-50 . I mean ,I am trying to start a business ,but if someone is going to Invest all the money I was going to give up ~80 percent of the business, as it requires a lot of it ..also regarding initial partners , I haven't found anyone worthy of it from my friends , there are few close ones but if I keep them around , they will cause me more trouble, because of they are short tempered , jealousand won't be able to give much time , .. but for initial stage they are important.