Facebook Page Coach, www.LikesBeforeLove.com, Future Founder of www.AddMe.As, Organizer of Tingling Thursdays - www.tingling.social. From Kuala Lumpur, Malaysia. Has helped over 200 Facebook Page owners with their social media growth, strategy, & content development. I've also mentored & given talks for organisations such as Malaysian Global Innovation & Creativity Centre (MaGiC), Young Corporate Malaysians, Cradle Coach & Grow, TalentCorp, Asia Business Forum as well as The Star Education Fair & The World Summit On Media For Children Foundation.
App development cost varies widely depending on the features you want. A more specific answer would require a list of all the product features. It's like trying to find an answer to "How much would it cost to build a house?" If your app has a social enterprise or charity aspect to it though, you may find success through crowd funding platforms where you might either find people to contribute funds or development expertise.
The downside is if you ever decide to sell the company, it's something out of your hands with your name on it. Jimmy Choo doesn't own his own brand anymore, neither does John McAfee of McAfee Antivirus. Simple conclusion - don't brand it to your name if you ever intend to sell the company.
I usually ask people this - if you were offered a million dollars, what would you do with it and how would you spend it? It's a mind-opener - it takes away the financial aspect and makes you think of what you would do if you already had the money.
I think the closest analogy would be - the same way you're flirting with a girl. Like, if you know she's really interested you call the next day. If she's not then you "play hard to get" and wait the standard 3 days. You have to look at their indicators of interest, whether there's a specific timeframe involved, etc. Either way - it helps to follow up as much as every 1-3 days - you want to get the conclusion to a simple yes or no as soon as possible. Hope that helps!