Flood Maps
Here is an application that plots this already on Google Maps... It goes up to 14 meters of flood increase. So that would mean the water would increase in elevation by 46 Feet.
What will be necessary is to estimate the volume of ice at the poles and then to calculate how much heat is required to change the phase of this ice to liquid state. Once you have that heat we can estimate the time required for this 46 foot elevation in tidal plane. Then you can find out the # of properties on these new "waterfronts" and determine approximately how much cash you will need to accumulate to purchase them.