I decided to buy an old cab to convert to mame, as this seemed to be the most economical route.
That was until I actually tried to find one. Every time I search Craig's list, I find loads of suitable cabinets. For a minimum of $700.
I guess it must be a geographical thing, and I just don't happen to live somewhere that has an abundance of old arcade cabinets.
I drove by a thrift store a couple of months ago and did a double take- there were two arcade cabinets in there!
Needless to say, I turned around immediately and went inside.
Two arcade cabinets, both in poor condition, sold 'as is', with many missing parts, one with heavy water damage, both $700!
I can only assume the store checked Craig's list to see what they were worth.
I got interested in building a mame cabinet as a result of a raspberry pi experiment, so I had all of the guts ready to go but with no cabinet. I was throwing away a dresser one day, and when I looked at the dismantled boards, I thought 'hey, I could build a bartop out of this!'.
Now I know I really will use an arcade cabinet, I am gradually acquiring the parts I need as finances allow.
There's no rush, because I have my ghetto bartop to play for now so I have breathing space.
It's only really expensive if you want to buy everything all in one go, otherwise you can spend $20 here, $50 there etc until you have everything you need.
As for collecting fixer-uppers and flipping them, you probably can do that, but not where I live.