Fair enough. It's definitely an investment right now and a massive project that'll take a while to hammer down. They just released the FPS presentation at PAX Australia (I think it was) so it's a long way from being finished, but looks fantastic so far. It's pretty good for a beta, but you're absolutely correct that it's unforgiving on lower-end machines. I had to do some upgrades on my rig to get it to play correctly.
Multiplayer is actually a thing right now for it, and it's not the glitchy, broken garbage you normally see in betas. But, I agree wholeheartedly that $40 plus the cost of upgrades is excessive to be able to play an unfinished product.
Do you know of any other space sims out there that are half-decent and won't break the bank? The only other one that I play is X3:AP, but, sadly, it isn't multiplayer.