A WAY TO SOUNDPROOF YOUR HOUSE WITH SANDBAGS AND SAVE $10, 000 OR MORE FOR EACH ROOM AND SAVE A LOT ON HEATING AND COOLING YEAR ROUND.

Sandbags may be an option stacked along your wall parallel to it to save space. This is super insulating.

Did you know? Professional soundproofing goes for at least $15,000 per room up to many thousands more.

Even so According to AI 

"A standard 14-inch-by-26-inch sandbag usually weighs 30 to 50 pounds when filled. 

..Empty sandbags made of woven polypropylene can cost between $0.19 and $1.50 per unit, while bulk sand can range from $10 to $40 per ton."

For one ton of 20 sandbags it might cost just 30 dollars. You might try narrow sandbags to save the most with just $10, for just one foot, 120 per wall. A frame much like a shelf to put them flat on the wall might be cheapest while you hang the sandbags vertically near the wall between the shelf. Overlap the bags to insulate best. You want to make sure your framework is supported more than well enoughI would think you could sandbag the window and leave a video outside connected to a monitor, and you can watch the outside, and also change the view, your house is a paradise in Iowa beside Miami Beach!

With the door, you might also make a heavy door with a frame of pipes to hold the sandbags. If the door is too heavy you might add a motor. 

 Also if you want you can just sandbag your wall outside most inside and decide if you want more walls by this method. To lift the sandbags you can use the shelves and stack the wall or buy a cheap lift, cheaper than before. This is an easy cheap way to stop noise, save heat and AC and exercise your AZ Amazon biz!

 This may be more valuable  if you own your own rent! Or if you live near a floodplain, a lot of people are not told they live near the river. Or for businesses to defend against flood damage. I used to live near a mall that got flooded and all the stores got more business on the second level than moist of the rest!