tbh, if you're not that bothered or budget is an issue, I'd just skim the walls, then use a layer of greenglue, and acoustic sealant dipped screws to mount a layer of 5/8ths drywall. The green glue will give you a bit of damping and decoupling (as long as you make sure there's a 1/4" gap to any surface).
Then if you need it, build a little vox-box (or you can buy pretty decent prefabbed ones that come flatpacked).
I would go with carpet though - wood floor/concrete/hard surfaces really can give a nasty splash when it's not been perfect acoustic standard installation. Laminate behaves like shit with mid/high frequency and concrete will give you a nasty slap echo effect with peak transient sounds.
Get a nice thick carpet and only worry about room treatment once you've got all your kit perfectly in place.
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