Hi guys. I've been reading Rod's book, and I'm thinking about perhaps building an isolation area for vocal recording. I have a space which has recently become available to me: The space is a spare BR in my house. Dimensions are 8'W x 9'L x 7'.5"/7.7"high ), and I'm wondering if it might be more beneficial to build an actual vocal booth within this room, or, would it be better to alter the existing room, turning the room itself into a booth, which would include altering existing construction and materials that are already in place. The walls are not parallel. They vary as much as 2" on the ends of each, including the ceiling, which has a slight canter that results in the ceiling being lower by almost 2" (1 & 7/8 to be precise) on one end. Existing materials are what you'd expect in a 70 year old house; plaster ceilings, 5/8" sheet rock walls (insulation between the joists on the outside walls only ( 2 outside walls, with OC R19 in 16" center joists) and a hard wood floor. There is 1 window, ( dbl pane, energy efficient). My instincts tell me... no... wait, scratch that. Who am I kidding? I have no instincts. I'm looking for a good level of isolation, I don't want to half-ass this. I'm more concerned with noise from the outside getting in than I am sound getting out, although, if one is treated, then so is the other, right? This noise could be anything from birds chirping to a heavy rain storm, or, the occasional truck going by. Ventilation is, of course, important. I'd like to be able to breathe in the space while I'm singing. This is not an option. It's only necessary that the space be big enough to accommodate one vocalist comfortably, although if you decide that using the entire room would be better, I could easily - comfortably - fit 4 vocalists. Acoustic treatment methods within the space are of course a concern. But my main question at this point is: which would be more effective and cost efficient? Reconstructing the room for this use, or, building a separate vocal booth that would be placed inside this room? I do have some existing materials on hand - half a bale of Roxul Safe & Sound (3" thick battes) as well as quite a bit of construction grade lumber - 2x4's, 2x2's, 1x2's, as well as four 4x8 sheet of 3/4" ply. I have no OC703 remaining. Location, Northeast Ohio. Budget: $500 (or is this a moronically low figure of expectation?) d.