How to start a BTM business?

Could you elaborate on the steps involved in launching a Bitcoin Teller Machine (BTM) business? What are the essential considerations to make before embarking on this venture? How do you identify a profitable location for the BTM? Additionally, what are the legal and regulatory requirements to comply with, and how can you ensure the security and stability of the system? Also, what are some effective marketing strategies to attract customers and generate revenue? Lastly, how can you stay updated with the latest trends and developments in the cryptocurrency industry to maintain a competitive edge?