Having those mining hardware is considered also as an investment in bitcoin but only in the other form. Still we gain profit from here mining but it take months to have it. As  considering that, to repay all expenses first and the next is totally your profit. But if you want to have profit immediately, then just invested directly to bitcoin.
This is the insight that might guide you, the final decision is coming from yours. If you are happy of doing this, then a big possibilities thatbuou will succeed.