Project Proposal Fall

The new term of my Hogwarts knitting club is about to begin and I am going to attempt another OWL. (This is a project that should take 2-3 months to complete). Not all the information is in on the options for the fall but if they are close to the same as the last term my proposal will look something like this.

Name: Christinahwest
House: Gryffindor
Year: Third
OWL and Option: Muggle Studies Option 1 Knit an adult sweater to use as a disguise when dealing with muggles. (this may change and could need to be edited depending on weather the options change for fall)
Sequence and Challenge: I propose to make The Larch Cardigan (an adult sized cardigan). The challenge for me lies in that I have never made an object of clothing like this before (first ever sweater). I will be learning seaming and will be challenged in my pattern reading abilities. I have never worked with a pattern so involved before. And have never made a project of this magnitude (this is a lot more yarn than I have ever used on a single project before).
Halfway Point: The pattern states that I should be at my halfway point once I have used 3.5 balls of yarn (625 yds) I may end up having to estimate when I reach the halfway point of the 4th ball of yarn.
Supplies and swatch:
The gauge is 23 sts x 29 rows= 4” in Stockinette st this is my first ever swatch (in future I think I will make a garter boarder so I don't have to deal with the natural curling stockinette st produces. But despite this after blocking my swatch did turn out as a 4" square Sorry the pic isn't great:

Here is a pic of the Pattern:

The pattern calls for 1250 yards of yarn. I have 1424 in my stash right now: