Construction costs are currently skyrocketing

Can someone recommend a good app/program for ETF savings plans? Or simply open a depot through the bank (I am with ING)? Since I am taking the kfw 153 loan and want to pay it off after 10 years, I thought of a 10-year ETF savings plan.

10 years is already relatively risky. It is not without reason that the entire advertising brochures always choose periods of 15 to 20 years to show how safe it is...

10 years is already relatively risky. It’s no coincidence that all the advertising brochures always choose periods of 15 to 20 years to show how safe it is...

And what would be another risk-averse option for 10 years?

For example, the mentioned special repayment. Or always one year saved on staggered (10, 9, 8...) fixed-term deposits. Apparently, there are a few that already offer 1.5% (for 10). Next year, possibly also for the shorter batches.

We are lucky that our contractor ordered in time after all, of course we received a price increase… but our construction does not come to a standstill because of it. Next week our screed will arrive and the external insulation is also coming on time. Our advantage was that we could start at the end of February and our contractor already said back then that he views the current price increases with concern. What we have heard so far from others was roughly like this: "We could put up the shell in August (construction was supposed to start in April) and completion next summer." "Price increase €36,000, the client is rejecting windows/doors and wants to get the cheap ones from Poland himself… probably others thought the same and there is currently nothing even there." "The client has a fixed price agreement and simply does not accept the price increase and since he received the new offer, no one has been on the construction site anymore." "The shell has been standing since May and the roof could be finished with luck at the beginning of September." My brother-in-law works in a larger carpentry/joinery and the colleagues in production are on short-time work, the rest process the remaining stocks as far as possible and then are also at home.

We are lucky that our contractor ordered in time, of course we got a price increase... but at least our construction is not at a standstill. Next week our screed will arrive and the exterior insulation will also come on time. Our advantage was that we could start at the end of February and our contractor already said back then that he is worried about the current price increases.
What we have heard from others so far was roughly like this:
“We could erect the shell in August (construction should have started in April) and finishing next summer”
“Price increase of €36,000, the client is dropping windows/doors and wants to get the cheap ones from Poland himself... probably others thought the same and even there nothing is currently available”
“The client has a fixed price agreement and just doesn’t accept the price increase and since he received the new offer no one has been on site”
“The shell has stood since May and with luck the roof could be finished by early September”
My brother-in-law works in a larger carpentry/shop and the colleagues in production are on short-time work, the rest process what they can from the remaining stock and then they are off at home.

We are also getting a small price increase of about €5,000. The construction company has pre-ordered many things, but other external trades have not. That is why, for example, the eaves box is becoming more expensive. A construction time guarantee can easily be kept if construction starts by September 2021.