Generally there shouldn't be too much trouble integrating any aftermarket remote start device---depending on the year of the chassis that is. E-Series are somewhat plain simple whereas most newer remote start systems would be technologically more advanced than the vehicle. As mentioned the "wait to start" feature for glow plugs being one example.
The key to successful operation is installation---once you settle upon a brand and/or model download the installation instructions and see if its something you want to do yourself. If not find a well-reviewed installer who'll do that for you as well as give free follow-up service for any issues related to their work and products.
Without some sort of sub-system that would prevent a vehicle from being driven away when the remote is activated I'd not want one for myself. I'm thinking some sort of brake-pedal temporary shift solenoid disabling triggered by the remote. When the fob holder is ready to drive they could re-instate the shift solenoid via the remote of fob.
Just an idea--------please let us know what you do about adding this sort of device.