Hey i am starting new gutter installation bussiness need help with what type of mitre saw should i buy, how rpm is recommmended, and best practice suggestion thanks

In a new project we are undertaking the customer has asked a heating system be placed in the trough to keep it from icing up. The job location is in Canada where during the winter the temperature routinely drops below -40 F. The trough being put up will be 6" seamless painted steel. Basically...