Pipe Dreams

I have many dreams. I always pictured myself as a rock star. Always. Since I was a child, I've envisioned myself on stage, entertaining. I have a decent voice and I can write pretty good lyrics, but I can't really play an instrument.
I love to write. I have written several short stories lately. And I've been working on a few novels. There are several stories sitting in my head just waiting to be written out. I guess I need to outline them so I don't forget or they don't get tangled into one another. I just worry that what I'm writing isn't good, that it's just a dream that anyone will ever read it and get enjoyment from it.
I picture the house I want to live in. It's two story, made of stone. There's a sort of floating staircase in the room that goes up to the second level, which looks over the living room. The living room is huge, with a sunken area for the couches and a projection screen TV. The screen it projects onto is shaped like a large boat sail. There's several rooms off the living room: the kitchen (equiped with an 8 burner electric range and two ovens as well as a huge island in the middle and a breakfast nook set into a bay window and the laundry room shooting off of that near the garage entrance), a dining room, a work out room, a library with floor to ceiling bookshelves and two chaises to read on and a desk with the computer, a guest bedroom, a full bathroom and a sunroom with banquet window seating and an area for crafts that doubles as a game table and treated windows that you can see out of, but no one can see into. On the second floor, there is a master suite complete with balcony and full bath (with a three person jacuzzi tub) and walk in dressing room, several other bedrooms and bathrooms to go with those, a playroom full of the latest toys that also has four of those big chairs that pull out into single beds and a reading nook at the top of the stairs. I see this house in my head and it sounds a little weird right now, but in my head it's lovely.
I want several vehicles. My dream car is a 1968 dark purple Chevy Camaro. I also want a 4 door Jeep for fun. And a Hybrid for every day driving. I want to get Allen a 1968 Dodge truck, red in color. And of course, we're keeping the Dodge Ram we have now because I love it. So along with the above described house, there's a multi-car garage with storage and a work area for when the cars need attention.
I see all these things in my head. It's what I want. And being in America is all about having dreams. But are these realistic dreams or just pipe dreams? What do I have to do to get these things? Do I have it in me to do it? Should I keep hoping for these things? How do you know when it's time to give up a dream and just let it go? How do you cope when you do have to let a dream go?