I wanted to respond a bit separately to the issues around my disability, and leave the more structural discussion on its own.
I'm familiar with some of the housing sites for people with EI (Environmental Illness, which also includes toxic mold injury), and appreciate seeing them posted here. They usually have long waiting lists, and are often not accessible for both MCS/ES. The one close to me, a HUD housing site specifically built for people with MCS, has overhead power lines immediately behind the building, and nearby antennas, not to mention the apartment building next door is frequently spewing heavily fragranced dryer exhaust fumes.
I'm relieved that these places exist, because they do work for some who would be without shelter otherwise, but fundamentally, people with MCS and/or ES are as different as, well, everybody else. We have a lot of common experiences, but we also each react differently to different things.
That's because the 'sensitivity' label really obscures the cause. For the most part it's not about something inherently 'sensitive' inside us, but about exposures to things that are inherently toxic to everyone to varying degrees, and each person's sensitization depends on the toxic mix that injured them.
MCS looks like it's a wide range of vague symptoms only when the cause is obscured. People's symptoms clearly match the established effects of various commonly used chemicals, but medical schools teach very little about chemical poisoning (which is what MCS really is), and doctors are not trained to look up effects of individual chemicals, let alone the vast mixtures that have become ubiquitous in our environment.
I don't have time or energy to defend or validate the existence of people like me, and I would question why anyone would feel the need to 'push back' about someone's medical condition if they are not that person's medical provider, especially on the basis of very little detail I shared. I did share that I'm in my 50s and have been ill for more than a quarter century, and as such a more likely assumption, than that I'm making false claims, is that I probably have a pretty good understanding of my own physical reality. Maybe instead of trying to diagnose strangers, ask some questions about how they got sick, if you're really curious.
Perhaps when I'm not in an existential housing crisis I'll find the part of the forum where this issue can be debated, and I'll post lots of evidence of chemical and electromagnetic harm, but this is not the time for me to do that. I will however point anyone who would like to know a little more about the history of the difficult relationship between the medical establishment and people with chemical injuries to Dr. Anne McCampbell's article, MCS Under Siege. It was written a couple of decades ago, but the socio-political effects on the injured remains much the same:
https://annmccampbellmd.com/publicationswritings/publication-1/
I would like to acknowledge that the way I finally found this forum is because one of Bob Wells' videos from a few years ago was making the rounds again, an interview with a woman with MCS who was living in her vehicle:
A large number of people in the EI community end up living in their cars at some point in their lives, and the discussion of tiny houses on wheels and van life is one becoming more frequent among us. In fact the site with the EI housing resources, also has a page about living in a van (which links to some of Bob's work):
https://www.eiwellspring.org/saferh/LivingInVan.htm
When it comes right down to it, disability is self-defined. Everyone defines their own functional impairments, regardless of how others may perceive them. The challenge to provide evidence is only relevant when dealing with bureaucracies, like applying for services specific to the disability, or going to court like I may have to.
I do have help from a lawyer, and I am aware of a lot of the social services, and am defending myself as best as I can, but considering my environmental reality here, I will have to move sooner than later, and there is no way that I'm going to be able to pull off everything that needs to happen for me to move into a long term shelter in the time frame available to me, so I need to figure out a temporary situation that will keep me safe in the meantime. That's why I'm here.