Some details on his equipment here: http://www.astrophoto.fr/info.html. For reference, the first tube and mount he lists:

Celestron C14 Edge HD - The telescope 'tube' alone (aka OTA) ~$8k USD

Takahashi EM400 - Equatorial mount, ~$9kUSD

This doesn't include any additional optics, filters, cameras, etc.

Solar imaging is technically challenging and gets ridiculously expensive very quickly because of the contrast benefits of extremely narrowband filtering. He references using a Takahashi FSQ-106 (~$7k), Coronado double stack (also ~$7k) and a .5 angstrom Daystar filter (~$4k).

Massive massive investment in equipment. Hard to say if he has everything he lists but easily $100k total, probably closer to $200k. I would hazard that if you tried to start today, you couldn't find any of the above in stock. You're going to be scrounging the used market (which is fortunately quite active) and/or waiting 2-3 years for order fulfillment. I started into this hobby last fall and it is quite frustrating just getting your hands on what you want.