A down economy calls for creative strategies, and now four New York architecture firms have joined forces to capitalize on the pop-up store trend. DESIGN.STARTS.HERE is a collaboration among Basil Walter Architects, 3-By Architecture, PraxisNYC, and Re:Design Architecture + Interiors. They set up shop in a vacant storefront at 447 Hudson Street, from Saturday, 12.05.09, through Sunday, 12.13.09, 2-8pm each day. Homeowners who couldn’t normally afford architectural services can make an appointment online or walk in for a free interior design consultation. A menu of services for flat fees ranges from $250 for a diagnostic walk-through and survey of a space, to a $10,000 pre-construction package including drawings, specifications, preliminary estimates, and a construction schedule.