Congrats on your gains brother. Don't try to do any hanging until you have at least finished the JP90 routine. You want your penis conditioned well first. When the time comes, you can make your own hanger to try it out and see if you like it first. It can be made for about 20 dollars. If it turns out you are gonna stick with hanging, then use your homemade version till it no longer supports the weight then move up to a Bib hanger. If you don't like hanging, at least you won't have much money invested.
It may be possible to gain 2 inches jelqing but it will take an extremely long time.
Due to personal experience, I would continue your PE until you gain a full inch or until your wife notices and then tell her about it. I did it in secret too and it was getting harder to hide it. When the subject was brought up, I decided to tell her. Now I had proof it worked. She had noticed before but I always played it off. She was actually very touched by the fact that I would spend so much time and energy on something that would benefit her. She now watches me do it and always gets turned on by it.
I will PM you the link to the hanger when I find it. It's a modified version of the Captain's Wench.