2-3 year large sum park

Hi all,

Stand to make a good chunk of money off of upcoming sale of house (300k+). Moving to a very HCOL area and plan to live on base. My thinking is T bills or CD for 2-4 years until we purchase another house. I have emergency, retirement (max tsp/Roth ira), and taxable brokerage covered, want to stay risk averse due to short horizon.

What is the preferred move in the next 90 days?

Thanks!