2 million, having just launched a 5 probe ship to the joolian system. That should net me several million more. I don't revert, and no quicksave. So I am finding it too easy. I haven't done any part experiments after the first few, rescued one Kerbal, and I stick to one flag per planet. Probes have going to Eve, Gilly, & Duna, and have sent and returned a Kerbal to Ike. Going to throw out my last two probes while the Jool probes transfer, and then ramp up my manned missions. Finding it easy now, but paying for a return trip from Eelo might be harder.