A comprehensive Business Plan. What makes your business different from all the other builders? Affordable, quality on time has been done to death. New products and methodology and style are good starting points. The Small Business Development Corporation have some good examples.
A projected cash flow showing how you will fare over the next 3 years. MS Project is good for this. Debtors are a concern for new enterprises and unscrupulous clients will exploit any weakness so if your contract states payment in 5 days make sure they stick to it.
If you are proposing a partnership or company you will require an employment agreement nominating you as the building practitioner.
A Statutory Declaration stating you have gifted $50K to the business and that it is irrevocable.
A letter from your accountant stating the business will not trade until your Contractor’s License is issued.
Lastly a bank statement showing the $50K of funds at your disposal.
While you’re waiting for the BC to process your application, why not put your work in a video and post on You Tube?