Ask HN: 14 days off work, help me pick a project

I've got 14 days off from work and I want to build a SaaS/app to generate some income to substitute my job. Need help/suggestions on what to build: A) Idea: iOS/Android app that lets you "review" Facebook friends anonymously (imagine Amazon style reviews). Reviews are private, only the recipient can read them. E.g. you smell good but your time-keeping is horrible. Business model: Get acquired. Issue: Difficult marketing. No income for a while until funded. B) Idea: Small entrepreneurs need finance ($5k-$30k to open a local coffee shop), other people have small amounts saved up ($5k-$50k) and don't know where to invest. Solution: Connect these people through a network (imagine linkedIn). Business model: Entrepreneurs get charged to upload a business plans. Investors get charged a monthly fee to view profiles of entrepreneurs and their business plans. Issues: Chicken and egg problem. C) Idea: Replicate FollowGen: http://edu.mkrecny.com/th