Well as my uncle always says, "It depends". Depends on where the lines need to be run in your house, whats around them and where you're going to run them from. Do you have a basement below the rooms you want to run to? Is it finished? Do you have an attic? Is it finished? Do you have a "wiring...
Depends what you're doing with the room. If you are going front projection Darker is better if you arent' then whatever adds sufficent buyancey to your watercraft.
Yes one 20 amp circuit should be able to run all of that and more (probably 2 of each of those) unless you have some insane equipment that sucks power like nobodys buisness in which case you'd probably know already because you'd have trouble using it in your house already.