How many are they looking to order ?
To get set up in printing, you really need a print and cut machine, something like the Roland SP300V would be a starting point.
Bad news is about the cheapest you will get the printer and other bits and bobs you need to run it is about £5000 – this will be for a used printer, which are a bit like rocking horse teeth as they dont come up for sale very often.
For a new printer would be around £8K inc VAT – add another £500 for a PC to run it ( really needs its own dedicated PC ).
So, unless they are looking to place a very big order, which will cover your buying costs of the equipment, it is probably much easier to sub out the job.