Looking to explore different business opportunities...Do not want to get licenses that I do not need until I am sure that I want to stick with that particular business..
I have not heard of the $1,000 rule; however, the determination for the need of a business license will come more from the requirements of your local government.
Check with your local economic development office to determine what licensing would or would not be needed for the particular type of business you have in mind.
Another factor would be the type of legal structure you intend to operate under (e.g. Sole Proprietor, LLC, Corporation). The corporation and LLC would have to be registered, while the sole proprietor may not have to.
Schedule a call to discuss your options in greater detail.