I'm amazed at the price that "professionals" will charge to do this. If you have attic access already just do it yourself.
I have done two (last house and current house) and both were in the basement. The basements were unfinished when I started but it's much harder in the basement because you don't have any real access to it. With attic access it would be a piece of cake.
Both times I bought this kit
and installed it myself. The kit was a little more than $300 for me to get it shipped to Canada.
Move all the insulation in the attic out of the way, drill tiny holes everywhere you want a "star" (only takes about an hour to drill a few hundred holes), put a fiber in each predrilled hole, use construction adhesive (or similar) to secure each fiber in place (in the attic), put the packs of fibers into the light source and tighten the screws. Put the light source somewhere in the attic with some ventilation and away from the insulation, plug it in and you're done. Comes with a handy remote that turns the lights on and off and a twinkle feature.
For me, I was drywalling the ceiling anyway so it only cost me $300 for the kit, $5 for some construction adhesive and $20 for the beer. With an attic you could have it done within a day.
I attached a picture of my current basement ceiling. I ran all the fibers like I described above, put crown molding all along the side, spray painted (using a professional paint sprayer) the ceiling flat black and then simply cut all the fibers about 1/4" away from the ceiling. The great thing about these kits is that you can paint right over top of them and when you cut the end of the fiber it will shine out again. Also, like all fiber optics, the fibers themselves do not heat up, just the light source.
Trust me, do it yourself, try it, you'll be glad you did. Msg me if you have any questions.