Obtaining/building distribution warehouses (like Amazon)with good access to the motorway network isn't particularly difficult if you can fund it. Finding some old EMU's that might be adaptable to carry parcels may not be difficult.
The difficult trick will be to provide a warehousing/distribution building that can provide quick loading/unloading from an adjacent electrified railway line whilst also giving easy access to the Motorways. When you exclude land adjacent to line in cuttings, embankments, green belt, zoned for other uses (eg housing), already developed, unlikely to get planning permission for various reasons (eg noise, adverse effect on local roads) there's not much available.
And then if you manage that comes the shock of dealing with Network Rail.