I'm looking to buy an all in one wireless printer. I'll probably print 10-20 pages in one month and not print anything in another. This is going to be my first printer. So, I don't know about maintenance or cartridge cost or how long a cartridge will last or things like that. I can't figure out which will be the most cost effective model for my usage in the long run. Please advise accordingly. Budget is around 7k. Can stretch a bit if needed.