I was quoted somewhere around $16K to do both basements. That's a pretty big expense. And, although you can re-coop the money you put into a kitchen or bathroom remodel when you go to sell later on, you cannot get money back on a dry-basement project. A dry basement is something that's assumed and doesn't otherwise enhance the value of a home like a contemporary remodel of any of the finished living space does.
Frequency of these kinds of events, or ones that end up with water seepage into the basements is roughly once every 2 to 3 years. It's been twice already this year, but it's been 2 years since the last episode before that.
If you leave it the way it is if you sell the house you can add has periodic indoor pool? Maybe that would up the price?