So you would like to create an exchange to rival coinbase?
Well good luck because they have developers and have spent more than 30 btc to create their site and brand
for more than 4 years now.
It will be a daunting task if you are able to create one like it.
No, please do not discourage new entrepreneurs. We must need more options for everything.
When someone coming forward with decent capital, we must appreciate them. Moreover I guess coinbase must have then started with lesser budget when considering 30 bitcoin's worth with current prices.
Over time any successful business will hire a team of developers and will be having more funds for further enhancements.