I kinda expect all adults to put some effort I to trying to work, at least a few times, and to do something beyond watching TV if this doesn't work out. But I'm also well aware not everyone can find a job that they can cope with - I've had to quit work twice for both physical and mental health reasons.
PDA and other autism traits may or may not be much of a problem depending on the job and your manager. I've been assured by professionals diagnosing my kids they're sure I have autism too, though still awaiting formal diagnosis. I've thrived in several 'stressful' jobs yet struggled to cope in ones most people think less stressful, usually either the expectations were unclear or there were personal conflicts. Where 'the job' needed me to do stuff I knew how to do, no problem at all. I have 20 years of appraisals rated on a 1-5 scale, never a 3...
My kids all have autism. Given DH and sisters do, this is unsurprising. It's also bloody hard work. 2 kids and the sisters and possibly DH have PDA features of autism (it's not a standalone diagnosis here).
Looking after babies and toddlers was fine, with SIL2 providing invaluable help. I knew I might struggle with physical and mental disability so worked to create a big network of people who could assist. If you don't have a couple people besides a partner who could help regularly and a dozen others to bounce ideas off and ask for help, I would get that in place before TTC (I advise anyone to get a support network, but that goes quadruple with known conditions).
Babies and toddlers were hard physically but not mentally - you follow the rules to feed and clothe and clean them and provide stimulus, and it works out. It's when they get older that your needs and their disrespect for them come into play and you get conflict.
SIL1 can't deal with that so just avoids the kids. SIL2 decided she couldn't cope with her own kids, thank fuck, but sees being aunt to mine as a huge part of her identity, which has its own problems as they get older (9-13) and refuse to buy in to her fantasies about the world or join in her games the way she wants them to. If she had kids that age, I think she'd have another breakdown and other family would have to care for them.
Think really carefully - kids are little for only a short time, then you have about 16 years of a person just as annoying as any work colleague, who you can never leave...
There's no way anyone would ever employ her despite having a degree - she does a lot of voluntary work and teaching skills, but can't act in a remotely professional way. Not lazy but certainly unemployable. SIL1 pretends to be lazy and living off a man, but in reality she's too anxious to work and can't manage without panicking - she's cared for her parents etc so isn't nearly as lazy as she makes out, but prefers people are pissed off with her than sorry for her.