We want to help both children buy their future home.

It will be extremely difficult to get the same amount for each home.  You can explain to your children that the purchase of the home now is an advance on their inheritance later.  That way, when they get their inheritance, they will still each get half of your estate.   For example, let's say that your estate is worth 20 and each child would receive an inheritance of 10.  You bought a house for Billy for 4 and a house for Sally for 5.  When you pass your estate is worth 11, because you spent 9 on the houses. Bill should get 6 and Sally should get 5.  That way, each received a total of 10 at the end.  I kept the numbers as simple as possible for illustrative purposes.  Add as many zeros to those numbers as you want. Alternatively, you can put the money into two trusts, one for the benefit of each child, and let them buy the house that they want.