I"m going to do a practice run and DIY build an 8x12 "Office" adjacent to the house, where I can learn and get my mistakes out of the way, then build the real theater out in a couple years, as planned.
I bought the plans here: https://www.icreatables.com/sheds/8x...hed-plans.html
I'll modify slightly to build a double wall room within a room. (decoupled double frame wall, air gap, 2 door airlock, minimal penetration of walls.)
I'm going to put my gaming PC in there, and get it out of the main house. Its current position in the back corner of my current theater compromises the seating positions, so it will be a win-win with more space and better seating.
One of the "big" unavoidable expenses to build out the real theater is the electric. I currently have a 200A panel fully loaded. My contractor estimated it would be about $5-7k to have an electrician upgrade the main house to a 300A service panel, and take 100A from that to trench and run a 100A sub-panel out ~100ft away to where the real theater is planned and wire that building up.
With a little office a couple feet to the side of the house, I can skip that and just run an extension cord to it from the existing exterior house outlets. Kind of ghetto, but fine for its intended purpose.
Anyhow, I'm going all out on the gaming PC. (It's already built.) An I7-990x CPU, a GTX 980 video card. 512 Gb solid state main drive and 2TB extra storage. The only upgrade I need is a 4k monitor. I've been waiting for the tech to mature before buying one. I'll make sure to get one where the resolution matches the 4k blu ray standard that is supposed to be coming in 2015 of 3840 x 2160.
Considering this one now:
I'll have that 32" 4k monitor arms length away with a 7.1 system all around it for PC gaming and solo blu ray watching.
Simulator Cockpit: Something like this: http://www.thewayiplay.com/mainforum...p?topic=2085.0
Using an aftermarket car seat: http://image.superstreetonline.com/f...sport-seat.jpg
Six Fusion Vibe 6's: http://www.diysoundgroup.com/wavegui...sion6-kit.html
One Fusion 4 quad center: http://www.diysoundgroup.com/wavegui...sion4-kit.html
One Full Marty, driver undecided. Don't need much for ~ 80 square foot of finished space. Will likely use a SI 18"
I'll try to find a low latency 7.1 AVR to drive the speakers without any extra amplification. Then run the subwoofer from an I-Nuke 3000 DSP.
I'm planning on drawing ventilation from a the main house by building a dead vent from an already conditioned space, and run duct through an attic muffler, out the side of the house, and into the back gable of the shed to supply conditioned air using techniques from The Soundproofing Co. : http://www.soundproofingcompany.com/...the-dead-vent/
Anyhow, my wife is hoping this will be enough to satisfy my AV lusts, and we won't need to build the full theater out later. I'm planning on starting the build in March, so will update as I move forward.