this is a great book which is easy to read and wont' overwhelm you: The divorce mediation handbook : everything you need to know / by James, Paula.
You will have to meet him half way on some things or it will just be a long drawn out battle. Since you meet with a L you know what is fair to ask, but do be open to other suggestions that perhaps will also work out for both of you. There were a few times when I was dead sure he'd agree to something and I had all these plans laid out only to be told by stbx that it didnt' work for him, so I had to adjust things quite a bit.
Now, the thing about the house/pending support is the hairy part. Have you lowered the price of the house? even if you just break even it will be worth it in the end, in my state the LS must have all the financial aspects figured out, so you really can't have a LS until you come to a conclusion about how much $ he will be giving you.
Describe to me your custody arrangement and why do you think he'll have a problem with the way you want it set up. In my state, debt is divided 50/50, it was a miracle that stbx didn't make me responsible for a cc he'd racked up during his MLC when he was gone and we were S, unless I was able to prove he spent the $ only on him I would've have to be responsible for that debt because he came back and was living with me.
Be not afraid...I will repay you for the years the locusts have eaten Joel2
30something 2kids survivor of S, MLC, A, D I have peace in my heart, at last.