Welcome to the jungle of being a furparent especially sa pusa. Nako low maintenance naman ang cats and I am glad na di ka bumili and you adopted.
One of the things that needed mo lang naman gawin ay make sure na may pagkain sila at cat litter. Tapos pa kapon mo din especially if female, para di dumami at maging maingay each time na mag in heat sila.
The rest, kahit mag bili ka lang ng automated food dispenser, at malinis na cat litter when you travel for 3 days goods parin sila.