I do not personally have albinism but I have been dating a man with albinism and I noticed that he uses a Dell laptop computer. I also have a Dell and I love it, plus I notice on their website that they offer a High Definition screen at 17", 15.4", and 14.1", so any of those would be easy to travel with (Mine is 14.1" across).
On my Dell all I have to do to zoom in to a very close level with the text is hold down the CTRL key (all the way at the bottom left corner of the keyboard) and use the scroller on the touchpad. It can get as close as almost a size 72 font. I know this works for websites but I am not sure about other programs such as design programs for stationery. I believe most programs have a zoom option, some up to 1600% of original size.
Again, I might not be the best person to ask but I know my boyfriend loves his Dell computer and so do I. This page shows you some of the Dell Studio Laptops and all of these laptops on this page have 17" wide screens. I hope that helps you, and good luck with your stationery business!