@paulofernandesjr, you can install your monitor any which way you want, it’s your project to build and customize. If that’s the easier path to go, then by all means, go with it. Displaying MM on a regular monitor without a two-way mirror in front of that is perfectly fine. My development setup is exactly that, a 27" monitor rotated vertically sitting on my desk with an rPi connected to it. You can just as easy take a 7" Lilliput monitor and stick it ON an existing mirror.