MacKenzie says her decision to keep all fabrics as authentic as possible probably made the early stages of the project the hardest.
She spent countless hours on Trade Me and in secondhand shops sourcing materials, the costume design gradually altering as she gathered more 1970s fabrics and ornaments.
Having no luck tracking down the couch fabric she wanted, she bought new vinyl from James Simons at Hawke's Bay Trim and Canvas, which helped her with the finishing of the couch squabs while Morgan worked on sewing the thick vinyl fabric.
As'70s households still had many items from their parents' and grandparents' era, she decided to incorporate an older-style clock into the design. With her grandparents' mantel clock in mind, after weeks of searching she finally spied the perfect one to fit the head of a model.
She also decided to include a crucifix, as religion seemed to be a bigger part of people's lives back then.
She was raised a Catholic and her favourite time of the week was driving home from church and stopping at the dairy for an icecream.
The train of the garment is made of a busy, patterned Axminster carpet, almost identical to the one MacKenzie's family had, and she cut it and wired it - using good old no 8 wire - into the shape of a staircase.
"Making Hay Daysie was the hardest and most rewarding thing I have ever done. It was a roller coaster of emotions when things didn't go according to plan and when they did."
Morgan is also considering entering the competition next year, possibly in the Bizarre Bra section.
Anna Maria Gori and Keryn Whitney, from Napier and Raukawa respectively, also had garments selected for this year's WOW.