Before you send the form
I don't know my budget yet
Give a range rather than leaving it blank. It tells us which tile formats, benchtops and joinery to price against, instead of guessing.
The house is a unit or has a body corporate
Mention it in the description. Approvals, access hours and waste removal are all affected and are better handled before a start date is discussed.
I want the laundry done at the same time
Say so up front. Combining the two rooms while the trades and waterproofing are on site is generally more efficient than running them as separate jobs.