I wouldn't bother where you're going in the US. You already start with an uphill struggle, so why narrow your options even more?
H1b would be one the commonest ways of getting over for someone in your position. You require a potential employer to apply for the visa on your behalf.
Fresh off the boat you'll certainly have all the problems with renting/travelling/living/etc. None of them are insurmountable, though. Shout when you've got the visa and folks will guide you through.
As an employee of an aerospace firm, you'd expect the health insurance to be part of your remuneration. This could involve them taking anything from virtually nothing to a significant portion of your pay out of your check.
One of the big problems you will run into is indeed security clearance. This will rule out many jobs in this industry for you.