If an architectural firm charges £4k for the job (as originally posted), is that greed + profiteering?.
A firm, of several people will have significantly more costs, and resources and these will be reflected in the fees they must charge and the client must pay to access those services.
So its not profiteering it is normal, and you can't compare the costs and charges of a firm with those of a one-man band. What would be profiteering is if the one man band charges the large fees of firms when the business costs are not the same
As for these other local designers charging more, do you know their business costs? Are they using a proper AutoCAD licence at £4k, have PI at £2k, technical indices access at £1k, and PC and plotter leases? If so the costs need recouping