I had to laugh when the op referred to 'million dollar' companies. Yea for the price of coils alone, I bet they are million dollar companies.
Premade coils at anywhere from $2.50-$8/ea (not including shipping or anything) vs diy simple twisted coils at a fraction of the cost. A spool of 316L runs around $2 for 30ft of wire, cut in half and twisted ends up around 12ft of twisted wire. 6" or so per coil means 24 coils and $0.01 for cotton to wick them, so 24 wicked coils for less than the cost of a cheap premade coil.
In the end, that's $0.08 to $0.09/each for diy coils. 27x to 89x cheaper than premade. And when the flavor gets iffy or you want to change juice flavors, it costs $0.01 for new cotton. Joc, not recycled tampons or cotton balls. The diy coils last longer, when the cotton on a premade begins tasting like crap you have to chuck the whole thing.
It's not the difference between eating at home and cooking for 30min vs eating out. A homemade quarter pound hamburger cost me all of a $1.50 and that includes the meat, buns, toppings etc. A quarter pounder from McD's runs like $3-4. A nice hamburger meal from a diner may run $8-10. To equally compare it to the premade vs diy coils, the restaurant hamburger would end up costing $40.5 PER burger up to $133.50. Can I sell you some $100 burgers? Step right up, for that price I've got 'em all day long for you. Damn right I'll spend 20-30min making them at that cost difference.
In the end you still end up waiting a good 10-15min on that burger from the diner so no real time savings by the time you park, go in, get seated, place your order, get your appetizer etc.
They also don't offer hundreds of coils for a given atty, maybe half a dozen or so. You're stuck vaping what they provide, if you want something different you have to hope that a competing company (and their proprietary atty which may suffer from leaks, poor airflow etc) offers them. Diy you have endless possibilities.
Figuring an average of $5.25 per factory coil and getting even 2 weeks out of it (if you can stretch it that long every time), $136.50 a year. If you change it once a week that's $273/yr. On average I change my coils once every 3 weeks, sometimes longer between. Even rewicking every day that amounts to less than $6/yr. $130-260 savings, sounds like a nice mod purchase to me. Better I get a new mod than the atty makers pocket that money.
Also love the arguments about what 'time is worth'. It's all subjective and can't be based on what a company pays in wages on a paycheck. Whether it's salary or hourly, it's a fixed amount. You typically don't get to tell your boss 'gee I'd like to work another 4hrs this week and make extra cash'. Or the opposite, when people will prattle on about what their time is worth, then blow 30min playing angry birds or candy crush on their iphone. Sort of kills the whole 'what my time is worth' argument. What it's worth is subjective, to some it's worth playing virtual slots. For others it's worth building coils.
Someone so adamantly concerned about what their time is worth and taking that position while pissing away their time trolling and making thin arguments via repetitive posts on a forum is priceless. Must have been some expensive posts or maybe their time is worth so much that they have pleebs to post on forums and argue for them while they tend more important things.