Hello Luckydaye,
The answers to each of those questions will vary depending on who you ask. We ABs are a diverse bunch, no two answers will be the same. I however, will answer your questions from my own personal experience as someone who has been an AB since forever
1. Yes, ABs support themselves financially. Being taken care of entirely, as in Mommy/Daddy paying for diapers and outfits and other accoutrements is not something I have ever heard of and it's an arrangement that simply wouldn't fly, no matter how accepting your partner was. I'm sure there have been AB/Caregiver couples who pooled their finances so that diapers and clothes were a joint purchase, but by and large, nearly all ABs buy their own diapers and accessories with their own hard-earned money
2. That depends on the AB and their Caregiver's preference. Some ABs only wet themselves, some, oddly enough, don't use their diapers at all, some, like myself, use their diapers as nature intended. ABs who don't have a caregiver change themselves, some ABs who have a Mommy or a Daddy may opt to change themselves as well. Some Caregivers will only change wet diapers, there are, however, rare instances where a truly special Mommy or Daddy will come along and change both wet and messy diapers. I have had experiences and been in relationships with Mommies of both types
3. I have heard of ABs who had a Mommy and a Daddy in the same relationship, I have even heard of ABs who had a wife/gf and who had a Mommy/Nanny on the side to care for this side of themselves, but I have never heard of an AB who had multiple Mommies and Daddies. I suppose it's possible, but that would be an awfully weird and unfair arrangement
4. Not being married or having kids of my own, I wouldn't know. Based on what married members on the site who have kids have said, the fun stops when your children are young because the priority then is to take care of them. When the kids are older or have left the nest, then the fun can start again. It's all about priorities. I'm sure some members who are married with children can answer this question better
5. Sure, there are reasons other than personal happiness. Some do it for a number of reasons all at once. Some view it as stress relief, for some it's a part of who they are, a form of self-expression, for others it is strictly a kink. There are even some who embraced this out of necessity due to incontinence. For me personally, it's a part of who I am and a wonderful stress relief and pastime
6. Generally yes as this is something that not everyone can and will understand. From my experience though, if you know people well enough, they will accept this. I have some very good friends who know and are understanding and I have also had 2 girlfriends who all accepted to a certain extent. One of these former girlfriends was accepting enough to be my Mommy, my current girlfriend is my Mommy as well, I even had a Mommy friend who cared for me at one point
It should also go without saying, but you can find acceptance and understanding from others in the community as well