So the problem is money, which again can be fixed, with for subsidies. Like the subsidies paid to gas power plants.

Money is never the problem. Not in the current climate where money is looking for safe havens. It's also about production and building capacity. These are project firms, funds managers etc. trying to find way to sink money. With "fleshing out the plans" I didn't mean "try to scrounge up money" but "put ink on paper that says who gets how much".

With battery storage it is possible to charge up batteries, when you only need 40GW and then power the grid, when you need 60GW.

And how many GWh do those batteries store.

Hydrogen and methane are not the same thing and especially when you plan for a mix of the two, you need two sets of pipelines. We are talking years until they are finished.

Germany already has a complete natural gas network, the hydrogen network already exists in patches and is going to be connected up... any year now. Most of it is re-using existing pipelines (they're often doubled up, if not even triple or quadruple), some of it is new construction. Have a look at a map, page 42, that's the core network. With the exception of the very south everything can be connected up using existing pipelines (solid lines), that thing won't have proper transmission capacity but it's already perfectly suitable to transmit the initial, lower, volumes.

Initial hydrogen demand is coming from steel smelters, they can't use methane. Dunno about hydrolizers going online in Germany on a grand scale, but we're certainly shipping them to Canada and Namibia.

This is Germany. The problem isn't that noone has done the maths, the problem, for the longest time, has been the CDU ignoring the maths that has been done. They seem to be finally getting on board though, not in the least because the energy giants told them to get on board as they've already switched over their investments.