Although not taken directly from your plans, it was highly inspired by ideas from this great website. Thanks Ana for putting such a great DIY resource together.
This is a simple, great looking loft bed.
Made with basic tools -> circular saw, drill, jig saw, and pocket hole jig. Lumber was all standard MDF sheet, 2x4s, 1x2s and 2x2s.
I would estimate total cost around $225 or so including all hardware, lumber, paint, etc.
My son is 3, so I designed a set of stairs. They can easily be removed in a year or so and replaced with a ladder.
Next up is a cottage style loft bed for his twin sister!