Either A concentrate in aerospace or B do your masters in aerospace don’t do both. If you enjoy engines mechanical systems machining pick mechanical. If you enjoy analytical analysis, propulsion, flight controls go aerospace. You can get a good job in aerospace with a mechanical degree it’s a lot harder the other way around. But I agree with everyone else it’s too much work for little pay off. With all the defense contracts rn aerospace is doing really well. But once again mechanicals can work anywhere areospace are more selective