When you say print drawings what format are you looking to print / plot, currently I use a Canon A3 printer for producing small format drawings which suits my needs if you are looking to go to A1 or A0 then you are heading into major spend. I closed a business down 20 years ago and we had A1 and A0 plotters that were seeing less and less use as our customers wanted the as fitted drawings on CD or DVD rather than paper prints the most use they ended up getting was if we wanted construction drawings onsite or to talk a client through a design and build project
As a comparison an A3 printer can be bought for ÂŁ150 - ÂŁ200 at the cheap end of the market and an A1 printer plotter will be around ÂŁ650+ move to A0 and then it is ÂŁ1500+