Fund it for as long as you possibly can. Start-ups are pricey ventures we all know this, and no doubt you're going to need some external support some time or another, but as a rule of thumb, it's always best to make that some time, another time for as long as possible. Keeping the funding on your own back will insure you reap what you sew. You sell a piece of your soul every time you reach out for eternal forms of financial aid, be it a loan or an investment. Now, if not seeking this support means not going through with the app, then by all means it is time to take that step. But as I said before, put it off as long as possible, pay with your own pocket and try to progress at the rate in which your pocket can afford it, this will also help ensure that you have enough time to evaluate every business related decision you are required to make, and can feel confident that you chose the correct direction with each and every decision of YOUR businesses development.