Um... the largest aperture on that 55-200 is f/4, you dont have a flash and even if you did you might not be allowed to use it, you dont even know what RAW is, you have 1 battery, and dont even know the relationship between aperture, ISO, and shutter speed... You are planning to take money from a couple that is probably expecting a professional photographer to capture the biggest and only day like this in their life, and I'm the ass? 9 Months wouldn't be long enough for a complete beginner with all the right tools to prepare for something like this, let alone a beginner with none of the right tools.
Here's a little STFU for ya... My wife's family is a bunch of redneck Michigan hicks. It's like little Alabama held in America's pinky. Her one aunt was married in a barn that fell down 3 months later.
Another aunt...I personally did the photography for her wedding. I arrive what I thought was a little early, and the best man, and the groom were outside, with suit jackets on....and blue jeans. As soon as me and my wife get there, they walk up to the front, there's like 15 people there total. They get up to the front, and no music nothing...her aunt starts walking down the aisle.
All this took like 5 minutes upon arrival...no joke. And ten minutes after the pastor came out of her study...we were in the car and leaving to their reception.
Point being...with the divorce rate in America the way that it is...there's enough weddings that aren't that special, and the worst ameteur couldn't screw them up.