Use the search function of this group and search for "marriage visa Savannakhet" or "marriage visa HCMC". You will find recent reports from other members who have just done this.
It is possible for your foreigner husband to go to a nearby consulate (like the one in Savannakhet Laos or in HCMC Vietnam) to get this visa without showing bank statements.
Yes, that is no problem. I opened my BKK Bank account on Udom Suk, but I used the Chaeng Wattana branch to certify that I had funds in my account. This should not be a problem. Just take your bank book and passport.
There are small foldable packets about the size of your hand, usually kept near the register. However, you don't need to stick them to anything. You can just use them as cash when you pay at 7-11.
Congratulations and thanks for the update! As you can see, many of us are interested in your results and you've surely helped more than you know. Thanks again!