You may not realize that testosterone replacement therapy (TRT) doses are really low. It isn't like being on cycle all the time. Sure, it is legal, but it isn't enough for size, you would still need to cycle, so the "legal" angle is much benefit.
Plus, you could buy a cheap, fun car for what you can spend every month on testosterone replacement therapy (TRT). It isn't worth it unless you have an actual medical problem.
Do you realize that if you spent just $200 a month on testosterone replacement therapy (TRT), you would be spending $48,000 of unnecessary money (assuming you might actually need it at 42). Just trying to add some financial perspective to the comments above.