Since I do all methods, I'll comment on your list..
1 - NO petroleum needed-
You drove a van to the jobsite...
2 - NO emissions polluting the environment-
You drove a van to the jobsite...
3 - NO doors open or security issues-
SealADoor fixes those concerns that most floor owners dont care about, security issues are very rare for most cleaners, even my bank lets me keep the back door open and I'm VLM'ing too.
4 - NO doors open allowing cold air in warm air out
SAD
5 - NO doors open allowing insects in
SAD
6 - NO doors open allowing pets to get out
SAD or bedroom
7 - NO close parking issues
You dont need your van close by?
8 - NO dumping dirty water issues,
sure, but no pad washing either, do you have two washer and driers or does your family's clothes get washed in the same machine?
9 - NO van door open inviting thieves
Butler/PTO or AT if you live in a high crime area
10 - NO van door open allowing rain snow to pour in
Butler/PTO or AT if you live in a high snow area
11 - NO long dry times
Operator error
12 - NO dragging carrying vacuum solution hoses through rain mud snow,
but rolling a heavy OP though both is fun?
13 - NO long set ups dragging carrying vacuum solution hoses from van to house up stairs to Bedrooms or down stairs to basements such is life, just like pulling a 100# OP up a staircase
14 - NO maintenance issues
OP's need maintenance too.
15 - NO ridiculously priced TM
$90K to earn $300k a year for at least ten years is hardly ridiculous.
16 - NO ridiculously priced TM repairs
DYS or a few hundred a year is not ridiculous, unless you're broke.
17 - NO ridiculously priced TM replacement parts,
you use that word a lot, which tells me you were not charging enough.
18 - NO ridiculously priced Wands Rotovacs Stair Tools Air Movers Sprayers Upholstery Tools Door Seal etc etc etc,
How are you cleaning stairs, corners, uph, tile, VLM, all with extra equipment, I hope..
19 - NO heaters needed at night to prevent TM freezing.
Most successful cleaners I know have a shop or a garage.
20- NO worries of TM or solution hoses freezing on a job
You worry a lot.
21 - NO worries of TM brake down or difficult repairs on a job,
see above
22 - NO worries of wick back,
VLM wicks too
23 - NO worries of dry dingy looking carpet after drying
operator error
24 - NO large lease or loan payments every month for TM
chump change compare to most businesses that earn the owner 15-20k plus a month
25 - NO low profits
operator error