from there the world is your oyster
The trend is toward 'allinone's' which can be bulky.
However some makers do offer 'portable' machines to match up to Lappies - look at HP for starters and Canon.
In the early days of inkjets Canon offered a BJ10 a black ony[no colour in those days] which has a foot print less than an A4 sheet- do they have similar now?.
Third party cartridges ensure economy to run look at click here