Oh great, another "Newbie" claiming to have $200k to start an exchange. I will give you a tip - people in the cryptoworld don't trust newbies. Either back your claims with proof or be prepared to be trolled.
It is time to enjoy the people who are having the bitcoin and they are investing in the bitcoin. The price of the bitcoin will be high in the future and the users will continue to invest in the bitcoin for the long term.200k is a very high amount of the money so they are very lucky to have that much high amount of the money and investment for your future.
A high amount really for spending on some other things but for making an exchanger? I think 200k$ is not so enough since marketing it will cost millions and the other maintenance cost can possibly more expensive to take. So better we shouldn't set some budget and its better that we have stretchable balance so that we can give an excellent quality service to the traders,