I'd recommend against Lexmark models.
They tend to be unreliable & ink costs far too much.
Canon & Epson will be the cheapest ink cost.
HP will likely be the most reliable, but their ink costs more, since they produce cartridges with the print heads built on (iow, there's no printhead to worry about wearing out).
Canon's printheads are considered consumables, so they are not covered under warranty, whereas Epsons are covered.
If it's only light use though, that shouldn't matter much.
Most people on here tend to say go with Canon because of cheap ink refills, but i would say either Epson or Canon should be fine.