How do I set boundaries with my parents

I am 40 year old woman.2children. I'm divorced. Work full time and live in a condo that my parents purchased for us when I divorced. I pay rent, all my bills, keep a clean home, cook, get my kids to and from every sporting event, go to all school meetings, etc... I don't abuse drugs. I do however have 2 parents that feel because they bought the condo, they're entitled to come over whenever, offer advice, and ask questions about the way I run my home. My father has lived his life giving my mother everything and never standing up to her. She feels she has the right to say what she wants whenever she wants to. She will text my son at night to check to see if and what I'm making for dinner. They call to see if the kids friends are over and tell me what time their friends should leave. They also expect me not to date anyone because I am a single mother and all of my focus should be on my kids, Therefore no men are allowed in my home. Not that I bring men over. How do I get my life back? Am I eternally living their expectations because I live in their condo that I pay for? I'm beginning to resent them. And I'm beginning to lose sight of my own life. I feel as if they're constantly watching me.