Most places don't need a license. It varies from state to state. Check with your state to find out if you need a home repair or contractors license and they will help you get one. You should also have insurance in case something goes wrong.
Your current class A driver license does not guarantee you a job with the railroad, although it does show that you are registered with the DOT. Check various railway websites...
Yes. Having a concealed carry license does not get you past the state laws concerning knives. Most states have laws concerning the length of blade you are allowed to carry...
Are you concerned that he's mentally unstable because of the bullet wound he sustained? That's definitely a possibility. You should tell your husband what's going on and stop communicating with...