Phil, why not just run a hose flexible food-grade hose above ground to move the wort from the shed to the basement? It will be easily accessible in case something goes wrong, and doesn't require any digging. I've seen these kinds of hoses in breweries a lot, with tri-clamps they are easy to move from tank to tank.
... party pooper!
I guess that'll work. I guess standard brewery hose will work. Of course, there's still the issue of running electricity and potable water out there. Elec must be able to handle 60amp +, 18kW. Big gauge stuff, no?
get some solar panels for the brewery. There must be some good incentives there... or maybe not I forgot that France is a big nuclear country isn't it? potable water is harder. Maybe a rain catchment? nah probably not consistant enough quantity.