This is easy - as surely you have more than two PCs around. Anyway, a new PC is so cheap these days that in the hours you spend fiddling around trying to get 2 nodes going instead of 3, you could have bought a third machine and be in the "good zone".[2]

[2] The best illustration of this I heard recently was how much it would cost to get online filesystem shrinking of XFS volumes implemented. At the current cost of storage and experienced XFS developers - it would take a couple of months at 120 gigabytes per hour. That's a lot of storage. When trying to save money on hardware, have a good look at this form of argument. Hardware is cheaper than people.