Idea concept build _ Sketch a concept, insert clip art or pictures, and use SmartArt to create a foundational visual... the base visual that you will build upon. Then add additional graphic components directly over the foundational visual. Alternatively you can create consecutive slides where you build increased complexity from the foundational slide so that you show how an idea concept develops and progresses layer_by_layer.
Don't spend money on a designer _ Creating a website using a template is much cheaper than hiring a designer. In fact, you can expect to save hundreds, maybe even thousands of pounds if you use a template instead of a designer. But will the end result be as professional? Combining large amounts of information with easy navigation is integral to an estate agency website and might sound like something you should leave to a professional. But yes, you can get a template that does as good a job.