1. There is no reason that she can claim any amount towards alimony or settlement when she is reported to earn salary income more than that of yours.
You may both arrive at an amount towards the future of your child, in that you can agree to give your share to the extent of 50% of the amount you both have arrived at.
If she claims legally then you can challenge her claim properly in the court of law and get her claim dismissed especially towards the claim for herself.
2. Even if you own a property, she cannot legally claim any share in it as a right.
3. NO
4. NO
5 The custody of child will depend on the mutually agreed conditions, so you can sort out the issues of child custody and visitation rights accordingly.
If the child is taken by you as sole custody, you can demand maintenance for your child to be shared by her along with you.
There is no question of pros and cons in th child custody, becasue it is not a material, it is your child, whatever, you may have to accept and take care.