For property 50/50 split. I'm in CA so if its a long term marriage 10 yrs plus.. doesn't matter how much money you made. Only thing may matter is if he owned property before you married. MONEY sanctions are cheaper than going back to court. Write them in your settlement in case either party does not honor the settlement.
No spouse will EVER enjoy paying alimony or child support so there is nothing you can do that will change that. You must only think of what you need to survive and also to not give anything away because you feel guilty or charitable. You will be pressured to be reasonable so if you start low you have nowhere to go but down. Child support is based on time share and income. So if your ex will take care of the children more his support payments will be less. In CA the courts use a program called the dissomaster to calculate support. Find out if they have something similar in your state. Try this website for an estimate:
http://www.alllaw.com/calculators/childsupport/