These are the three elements to attracting wildlife. Most people begin with the food by putting up a feeder or two and food is a big attractant. Often the next step is adding a water feature. Water features can range from the complex and expensive to the simple and inexpensive.
I remember my uncle and I used to sit in his back yard. He had put in an elevated waterfall fountain where the water tumbled down like water in a mountain spring to a small sunken pond. On warm summer days when I went to visit, we would sit on the patio and visit. There was never a day when birds and squirrels would not come and drink and play. Birds and animals like moving water. Fountains like this are often over a thousand dollars to put in but they are very attractive. If you have that kind of time and money, they can be very restful.
At the other end of the spectrum is the simple and inexpensive. By inexpensive I mean up to about 25o dollars give or take. Within that range there are a variety of prefabricated bird baths. You can find all kinds of designs and imprints on these. This spring my local mega grocer was selling ceramic baths for about 45 dollars and they had small reservoir fountains for 100 to 200 dollars. My favorite local
nursery was selling plain cast concrete, without any embellishments, for 45 to 65 dollars. Simple bird baths like this will weather and soften over time or they can be painted with a non-toxic paint to liven
any garden. At 45 dollars each, it is not out of range for most people and you can easily arrange several bird baths at different heights to create a little oasis.
You can read more at my blog, TheNatureSchool.