Take a deep breath and think about what you've just said.

In reality if the applications are of any decent size there is basically no difference time-wise doing those either in C++ with libs or PHP/JS/Python. I have fair practical experience on this.

As for open source - I run 2 companies and do a lot of development myself. I have family and also do a lot of fitness so I can creak along at my young age of 60. You get the drill.