Argh, cost of iteration is definitely going to be a major factor to consider, thanks for pointing it out. And the "Sell before build" approach definitely worth

Argh, cost of iteration is definitely going to be a major factor to consider, thanks for pointing it out. And the "Sell before build" approach definitely worths a try if I'm building something b2b, but for b2c it probably won't work. Most of the b2c startups nowadays don't make any money until 2 - 3 years down the track. But I guess this tactic can apply to selling my b2c idea to investors.