I take it that T2 being the least favourite...
I hate keeping tally's on cost as it is amazing what a machine tally's up when you collect parts for a while.
I got my Ironman about 12 months ago for $5500 and it is heavily modded - tastefully. But it got me curious what did the previous owner (luke) spent on mods. I searched and found where all the parts came from and in total $2100 on extra's not including any freight but easily $2500. I love this game heaps but recently getting right back into my CFTBL which is a Euro's import project machine with a crappy cabinet which I got for $2400 and it plays great.
so I know where you are coming from and yeah another food for thought