In Complete Low Voltage solution, what is the best choice? 1)Get full solution from one Company 2)Get each solution or system from a specialized company

i think to get the complete solution from one company is the best choice to avoid any incompatability issues.

getting the solution from a specialized company is the best choice in this field because the specialized company must be expereinced and it own all the tools required and the qualified person to do this mission and they undertand the risk and make sure is safety and insure the maintenance is going well