You could add a few 0s to your budget and still fall short of being able to start an exchange.
This is right op should add more 0's as seen above 2000 usd budget would just like be a dust and would only sufficient just on website creation templates and etc. I dont know how much would be the script though. Experience is really a must on this kind of big projects because running an exchange isnt really an easy job or thing to do.If you dont have experience then better to skip on this one.