Firstly, for the FDR’s just have to go to bank and make it with disclosing that till the time they do not attain the age of majority, the said FDR’s can’t be broken by anyone.
Secondly, put one guardian name also for the children after mutually decision between both the families.
Thirdly, as for the property point, I advice you to decide certain things then would be able to give you precise advice.