Sounds like Yansi might be referring to all the gear in Chris' compact setup and the total dollars/euros/buckazoids/etc. that might be represented there.
If he's anything like most others on this forum, it's a matter of making smart purchases and diligent saving and repairing. When you take that into account the total is still respectable, but much more manageable.
Tl;dr it's not just throwing stupid money at it.
How much do you estimate it?
I am interested about where to put all these things? I mean should he dedicate one room for the lab or is that in his garage or so?
I agree, a great set up like Chris', that would still be cheaper than a 'bad' car purchase. It is a lot about priorities and persistence, with a bit of cash flow!
Again, you are talking about a subjective matter. For someone like me I can barely manage to pay 50-100$ per month for electronics in my current status (will get better after this year), but for some they are able to pay 5k for electronics parts and gadgets.
I buy stuff one by one and aim for very cheap Chinese stuff like 21$ oscilloscope and Aneng 8009 multimeter. I am buying jelly bean parts right now from Aliexpress to stock on them like lm358, lm324, and so on (what do you suggest here btw?).
My lab now consists only of one table (approx 120x? cm) and 2 wall-mounted shelves (150x30cm).
Opportunist lurking on ebay works for me. Lots of bargains to be had. Slow methodical progress is good too. I think my bench worked out at around £56/month ($80) expenditure over 2 years and that includes the PC, all the test gear and an HF transceiver and the bench itself. I've bought, repaired and sold equipment to cover that entire cost and more.
Can you give specific examples and how to do it.