I have 3 dogs, 2 cats & 5 ferrets in the same house, actually trailer. It's a big 3 bedroom trailer but it's still small compared to a house. It works great for us, no problems here.

It depends more on the animals & people though, not the size of the house/yard. If the animals get along & you can provide them with enough attention & exercise and can afford to care for them all then it should work out just fine.