While I'm not a contractor,,, I can say I see a lot of homes built with the cheapest materials,, the quickest & easiest way possible,, all while the selling price is high because it "looks new & pretty."
Another mantra I see; "The higher up you go,,, the crappier the work."
I do minor home repairs caused by animals,,, OR,,,, OR,,,,, because a builder failed to properly build a home in a way to prevent critters from entering. (Usually the latter.)
A very common repair I make. Gable vents. Built to allow an attic of dead space to vent & not cause expansion or contraction due to heat or cold. Triangular or rectangular in shape, up at the top of a wall,,, with angled slats to prevent water from entering. Behind the slats,,, inside the attic,,, simple screen wire stapled to the framework. SUPPOSEDLY to keep critters & bugs out. Well,,,,,, bats & squirrels will defeat that simple screen easily. I know,, I fix a LOT of them.
Bathroom & in general,,, all floors & now even a lot of roofing is NOT plywood. It's a type of stuff called OSB. It's SUPPOSED to be water resistant,,, but it will not hold up over the long term if subjected to water. The older type of this stuff was called "Chip board." That stuff,, if it got wet,, swelled up & crumbled worse that a sea castle during an incoming tide.
Go to a home building supply store & price materials. Good quality plywood vs. OSB. Look at the cost per sheet,,, and then multiply that by the number of sheets it takes to build a house. And that's just one place builders cut expenses. If a home is being built to "spec" figure it will "look beautiful" to prospective buyers,,, but will NOT be quality construction usually. Especially in places where the buyer is not involved,,, such as a development that is being built to sell units after they are done.
And we think Ruger QC is bad,,, ! I can assure you a $250,000 home will cost you a LOT more in repairs you can't see or in a few years after use. And the homeowner gets to foot the bill.
I just looked at a very expensive home in an upscale development. Overall,,, the general construction of the home was better than what we normally see. The house is 1 year old. HOWEVER,,, the designer/architect had the chimney about 1 ft away from a 14 ft wide dormer that was part of the open cathedral ceiling. The roofing rafters are on 2 ft centers. When constructed,,, the builder,, or the architect FAILED to take in account the weight of the dormer in relation to the chimney. As such,, the roof has a distinct 3"-4" sag in-between the chimney & the dormer. No support header or bracing to compensate for the weight. Cutting corners & expenses allows for increased profits for builders.
Oh, and my Miss Penny used to work for a commercial builder. The entire time she worked for him,,, he had ongoing lawsuits,,, for bad work. The sad thing,,, some of them were due to the architect failing to properly design something. I recall a door that opened to a 14 ft drop. No stairs, nothing,,, just a door. And the architects have it in their contracts that they are not responsible, saying the builder should know when something is "wrong" & request a "change order." Not once did I ever see any of these lawsuits put blame on the architect, even when clearly their fault.
I know I got off the main topic. But suffice it to say,,,building materials have gotten cheaper,,, unless you are willing to demand higher priced materials. And,, you have to be heavily involved in the construction of a home to make sure it's done right.