Why are you aiming for a blue collar job? I think its possible for you to aim to at least a junior engineer, not just a technician. You have the basic knowledge of it in aerospace engineering and some company are willing to give you the training. Just look in the requirement, some are willing to take all engineering background for the job, because you have that engineering mindset. I really suggest that you look for this type of company. Look for an entry level job in this field above the technician level. If its marked entry level, I'm sure the company is willing to invest for the time to train you.
In terms of promotion, it really depends on the company. Some company like mine gives the opportunity for technician to be promoted to senior/managerial level. However, it took 10+ years for them to achieve that. While on the other hand, for bachelor/master's degree holder, it is possible for them to apply for entry level manager position.
So it is your choice, I would say it is possible to climb up the ladder. But, I strongly suggest to go above technician level.