If time is critical, consider a basement finishing kit. A finishing kit has insulated wall panels, and some include a walkable flooring surface and ceiling material for DIY installation. Depending on the size of your basement, these kits can be installed in a weekend. However, the floor won't be carpeted, the walls won't be painted, and there will be no electrical or plumbing. Other features such as doors, trim work, and more also need to be added.
Before walls and flooring can be added, the basement must first be professionally framed. Framing an unfinished basement can be very expensive; not only will it require a large amount of labor, but material costs are high as well. If you consider all the lumber your contractor will need to lay, plus crossbeams and studs, you will find that lumber is going to be one of the costlier aspects of the project.
Storage is key in a multipurpose space. There are several storage units throughout this basement. An IKEA cubby bookcase is a perfect fit for the office niche. Orange baskets corral small items and add spots of color to the basement's storage solutions. Stock cabinetry did not fit in the bar or media spaces, so the homeowners opted for costly, custom cabinets. Experiment with different types of storage units in your home to utilize every possible space.