The question is, can we start an industry on Mars that is efficient enough today such that the cost of producing and maintain infrastructure (solar panels, mining equipment) is lower than the output from the products?
This is in my opinion the wrong question, and the answer is unequivocally no. People will not go to mars to make their fortune, at least initially, they will go for research, for glory and because they can. In centuries to come the answer will be yes, but not on any reasonable timescale. People will move there anyway.