Aw, take them. Do not take them with the attitude that it is a "trial". Cats can take a long time to adjust to a new situation. "Trials" do not work with cats. Cats don't care how much living space they have as long as it is not a cage. Three cats in a one bedroom apartment is fine. As long as they have enough elevated space, a window or two to look out of and sleep in, and plenty of interactive attention, canned food meals three times a day, clean litter boxes, they don't need a mansion. What's most important is that those cats stay together and find a loving forever home. If you can provide that, then it's win win.