30 pounds in 30 days
Two developers working for 3 months feels more like 1.0 than MVP territory to me.<p>$60k <i>is</i> a lot of investment simply to test a concept, and would be a luxury out of the price range of most small businesses, let alone individual entrepreneurial subject matter experts who want to build a product - even really committed ones with money to spend.<p>Assuming you actually want to win the business, why not pitch a much smaller project to help them tease out some mockups and build 1 or 2 of the main application flows to MVP level?<p>This wins you the smaller engagement now with the likelihood of the bigger piece of work once the customer has been away and shown the concept to customers.<p>This is why I don't really like these $2k and $5k MVP packages that people are pitching on HN lately.  Your iterations should start with mockups rather than an MVP.