Years ago, I had the chance to write a song on an album that went platinum. The excellence of the artist, the magnificients songs (the others, mine wasn't. Hum, we composers we're all the same, aren't we ? ;), the marketing campaign of that album, everything made that album a gigantic hit in France and french speaking territories. It gave me the possibility to renegociate my publishing contract and get real money. I used all that money to put together a (rather comfy home) studio in my lovely attic. It costs me a (small) fortune also: some state of the art expensive synths, a big Akai sampler, a good digital desk, some patchbay, a brand new computer, a (by then) huge 21" screen that was as big as it was large, some expensive softwares that seemed so fast but couldn't really even handle 4 audio tracks at the same time if i put too many plug ins in the chain...
Today, i only have left a dusted patchbay and a sampler I don't use anymore. Everything else has been sold or given, updated to newer and better equipment that has cost me literally 10% of what I paid 15 years ago. I have a great Imac that never fails, as many external 1 Tb HD I want, two screens that are as large...