You seem to have decided to ignore, without any justification (if there are some, please show them), hundreds of year of data (experimental measurements, i.e. facts), the underlying theory predicting them (that has not been falsified so far), and numerous applications in our every day life (including current communication means, computers, etc.). Well, I don't know what to really say here. It is your choice. Fine.

PS: mass is different from weight (mass is constant, weight can change), and things can exist without taking space (for instance: light).