Since this thread is about someone who is still eating cooked foods and might or might not be willing to transition, I'm guessing it should be moved to the hot topics or off topics section.
Maybe I got the heat too high in the process because it was stovetop and not crockpot - but I wasn't going to buy a crockpot if he hated the stuff or we felt bad. Maybe I have to buy one jut to know.
You could try using the stovetop at the lowest setting, I suppose. You could even use a double boiler if that doesn't do the trick. You could also experiment with different lengths of cooking times, different acids to add, such as lemon juice or raw fermented coconut water vinegar, and different herbs and spices. You could ask him what his favorite spices are.
The main alternative to bone broths is eating raw edible bones and cartilage, which are not easy to find good sources of. Some people eat ground up eggshells others are able to buy small dried bone-in fish like anchovies, though they tend to be highly salted. Since you raise your own eggs, you could allow the eggs to be fertilized and then allow the embryos to develop a bit to make mineral-rich balut:
Remy Eats Balut (Food Oddities - [url=http://www.foododdities.com]www.foododdities.com)[/url] which is generally cooked, but I wonder what it's like raw. I doubt your husband would go for that, though. Another cooked alternative is to low-slow cook meat with small bones like chicken or quail wings and drumsticks until the bones are chewable and when you make soups and stews, leave the bones in instead of cutting off the meat and just putting that in the pot.
Google huh? Gonna make me work are ya? Dam - it's cooked fat - when I come to think about it I really should just chuck it.
Raw is better than cooked, of course. It's strange, though, that people throw away that cooked fat, but then cook their food in fat. What's the difference supposed to be? I don't understand it myself.
He's incredibly sick, very strange situation, it's not something that just gets over with..
When what the child is doing is making them incredibly sick, then, I know it's not easy and I hope this doesn't sound critical or harsh, isn't it time for the parent to step in to protect the child from their own destructive behavior, especially in this modern world where there are so many ways to go wrong? It wasn't as much of a problem in ancient hunter-gatherer societies, of course, because the vast majority of the available food was quite healthy.