I believe you stated it would be something like 2 times the price with a countractor or was it 4 times? Albeit would have been done in a matter of months rather than 5 years. But I think your issue was there aren’t a lot of qualified sound absorption treatment building contractors around?
Sorry I’m forgetting and trying to paraphrase.
Orders of magnitude more expensive is how it would have shaken out.
Expanding on this more (my post earlier was immediately after concluding my first day of snowboarding since 2007 and I was wrecked):
The estimates that I got for just the building ranges from $15,000 (what I paid), all the way up to $40,000. Once you consider interior finishes the cost differential gets nutty. Excluding the items that I had contractors do (gutters and downspouts, electrical, drywall mud and tape, mini split final hookup, and sound door installation) the costs for everything else would have more than doubled. The contractor would have to pay for the materials just like I did, but they’d also need to make a profit on those materials and in doing so would “mark up” the costs. Additionally, and certainly more expensive, is the cost of skilled labor. This isn’t the kind of job you can hire a few guys from Home Depot to complete and expect good isolation. A common contracting idium is to take the cost of materials, which would be higher than my materials costs, and double it for labor. So conservatively the cost would have been in the range of 2.5 times my cost having done the bulk of the labor myself. I’m in the ballpark (all in, including the contractors listed above and the original cost of the building, as well as permitting and the demo and removal of the old garage) of $45,000 on this project. So...
$45,000 - $15,000 = $30,000
$30,000 * 2.5 = $75,000
$75,000 + $15,000 = $90,000
I’m sure some breaks could have been found along the line to get down to $80,000-85,000 is my guess. With that difference of $40,000 I was able to reconfigure our basement to be a beautiful working medical office for my wife, tear off and replace the roof on the house, plant a huge row of arborvitae along our property line, furnish our living room, and a few other things that I’m probably forgetting at this point.
I would not do it myself again, but I’m happy that I did it this time around.