Wolf3gang I see you are from Ill. Are you going to maintain your Ill res. when you fulltime? The reason I ask is because Ill does not yet have a concealed carry law although it was mandated by the courts. I am a former Ill. resident so I keep up on these things just for fun. If you chose to arm yourself and your wife the advice to be trained is right on the money. Find someone who will give you a good through hand gun course, not just a 2 hour demo. The type of firearm you purchase will also be influenced on your physical abilities.
You would be wise to go to the range at lease a couple of time a year to retain your abillity to handle whatever it is you decide to carry. Many of us think going to the range is fun others don't. Remember that if the time ever comes to use your weapon your action will depend upon your training with that weapon.There will not be any time to think about trigger pull, is there one in the pipe etc. The decision to own and or carry is one that you need to think out. Some feel safe without a firearm others feel safe with a firearm. Remember as said before when seconds count the police are only minutes away. The most accurate shooter in typical defense type event is the average person who practiced the correct techniques of operationg the weapon. Not the top marksman who can light matches at 100 yrds. Whatever you have to ask yourself if you or your wife has the ability to use that weapon if that time arises. A lot to think about good luck.