Thanks for your answers! Might look into an A2 printer, though A3 would be big enough, really.
OK, so here's the calculation you would need to make: What is the purchase price difference
between the A3 and A2 models you would consider buying (and I agree with Dan Berg - hard to go wrong with an Epson 3880)? What is the difference
in cost of ink usage between them per sq.ft. of printed media? How many sq. ft. would you need to print before the extra expenditure
on the machine becomes worthwhile compared with the total savings
on ink? You would need to do some research for the data, but I think Dan's statement on ink usage for the 3880 is likely pretty good. Quite apart from those rather mechanical considerations, an Epson 3880 is a professional printer. The smaller models are not. There are difference of build quality and technical support; however Epson's higher-end non-pro photographic printer models do also deliver fine print quality.