Hi, just read all your posts, including your exchange with 25 about the letter - I agree wholeheartedly with her, and with your cleaning lady who sounds wonderful.
As to your interchanges with your h. It is really really great that he remains nice, and calls you.
I would go for the job interview, and see how you feel. Imo you are right to consider seriously not relying on your h: he may or may not continue to be reliable, and at some point many MLCers resent any imposition or demands. Some are happy to be generous, but not to have anything expected of them.
On the other hand, making decisions while you ar still somewhat shocked and traumatized isn't necessarily a good idea, so take it slowly and talk it over with a good friend whose opinion you value [and here too of course!].
You are dealing with all of this with great grace, and I hope and pray that your h gets help and resolves his issues quickly.
I suspect your h's resistance to a new job comes from a variety of sources: resistance to any change in the LBS, guilt that he is 'causing' this to happen, wanting to be needed by you and son [even though he may also come to resent it].