I have been working for last 3 years offline on my start up idea. It has got a specific target group audience and has high market potential in present scenario. The set up cost is coming around 20 lacs. Its a monthly subscription based educational product (having a specific target group of over 2 lac audience) . Now the problem i face is despite considering the volume of target audience as just 1 lac and a conversion ratio of mere 7% (after the marketing)the returns are coming very high (As high as 10% of returns per month). It sounds alarmingly exaggerated on papers that people with whom i share this proposal they are finding it hard to believe.How to work it out ideally on papers to make it look more realistic ?