Anyone ever think about building a dedicated room?


It looks like sometime in the future, when my girlfriend and I get married, that I'll be moving in to her place. She's currently living in a guest apartment in a house with plenty of space in the back yard. I've been toying with the idea of having a 15' x 25' (dimensions can be smaller) "shed" out back. I figured I could have it built with super thick walls and lots of insulation so that I could just use a space heater in the winter, and in the summer I guess I could open the doors and blow in some fresh air. All I would need would be some good electrical outlets and I'd be good, right? Have any of you thought about doing something similar and if so, what obstacles would I have? I don't even know if something like this would be worth it.
128x128b_limo
B_Limo, your girlfriend lives in a GUEST apartment. How can you even consider building an attachment to another person's property ?
The family that owns the house has become like family to us also. There lot is probably between three to five acres in the forest. I was wondering how much it might cost to just build a shed type structure that I could use as an audio room and then one day when we moved out they could use it for whatever they wanted to.
I have a dedicated listening room and it is true it can be perceived as a "man cave" that separates a couple, but I always explained to my wife its better than being on a golf course for 5 hours; if she needs me she knows where I am. Later when the kids come, it makes for a great place for privacy for sex; there's nothing like a good strip tease and a free lap dance from a woman who danced all her life to get the desire going and then be able to go at it without the kids being able to listen because of the sound proofing and a big lock to keep them out. I say build it, but get lots of advice how to do it keeping in mind a good size, sound proofing, dedicated lines, etc. You might be able to combine it with a home theater to watch movies too.
In response to the original question ... Yes. Every day. I wish I had the funds.