72K gained in equity - what is the quickest and easiest way to make increase it?

So I've recently gone through a divorce and gained a total of 72K from my ex wife buying me out of our house and also the sale of the family car. I'm currently renting a flat which will do the job for the foreseeable and is very cheap, leaving me with about 1.5K of disposable income per month after all my bills child maintenance etc. What is the best way to invest this 72K (plus some of my disposable income if necessary) in order to generate the best (but minimum risk) returns, with the view to buy my own house in the next 2 years?