Need Unreal Engine Designers and Developers

I built a real scale exhibition and theatre master plan using 3D max. I have signed a contract for an event and we have other events. We want a gaming experience where basically we are bringing the traditional experience of expo and summits into the virtual world except that the exhibitor can build his own selected booths, create their avatar, and add an AR store. We also have the summit in the theatre that should be used for any event. The experience should be AR/VR or screen and we welcome your suggestions. The mean thing is to bring the traditional expo experience into a virtual one.