For anyone still interested in this project.
Here is a running total.
My 24x24 room is nearly finished and should total out at around 30K Canadian $.
I have done all the work myself except the concrete & electrical.
Here is a rough list including taxes.
Building permit $150.00
Site survey $780.00
Excavation, forms, hardbase with rebar, concrete footings and pad poured and finished $10,000.00
All materials including lumber, roofing, sheathing, siding, insulation, drywall, doors & windows $10,000.00
Electrical including permit, 200 amp main service to house upgrade, new main panel, 70 amp sub panel in new bldg, 100' cabling to new bldg, all interior wiring, lighting, fixtures and heaters. $5,500.00
Flooring 576 sq ft $1500.00
Paint misc, tools and materials $1000.00
Landscaping on completion should come in at around $1000.00
****UPDATE*****
Had to dig this trench 80 feet all the way around the house as the main electrical panel is of course as far away as it could possibly be

My back is killin!
Most of the electrical is done, wired internet, cable tv, heaters and lots of lighting and outlets, enjoy the pics