A turn-key package
Venues (hotels, conference centres, exhibition halls and so forth) like dealing with Professional companies.
The main reason they like dealing with Professional companies is that they do not take up the venue's valuable time and resources.
Professionals arrive on time, set-up with the minimal fuss, provide all the things they need to do a good job and then leave the venue in the same state they found it in.
This is how we operate - even down to bringing our own bins and bin liners! In our 22' long Sprinter van we bring (amongst other things) tables, catering trolleys, flight cases, lighting stands, lights, and much, much more!