Certainly I have nothing against anyone spending their hard earned money as they see fit. Even if it's something as silly as a $3200 custom built HW with no support after couple of years. If you can't stand me pointing out how silly it is, please ignore me or something.
Don't worry already have and enjoying my AmigaOne X1000 system.
as for costs, I think the cheapest you could get the system the first time around was around £2000 with taxs and delivery, this is no cheap hobby, the price nearly put me off it, but it's something I wanted for a while, it's not for everyone and if you really want a cheap Amiga ng type of experices then I would personally recommend getting an old pc and installing Aros on it, not a PowerMac.