Easy solution- you install a timer, and set it to go on a bit before you normally take a shower. In the winter, when you cannot rely on the solar boiler for hot water during the day, you can set it to go for 1/2h stretches every few hours so that you always have hot water.
There are also instant hot water mini-boilers that can be connected to faucets so you don’t have to wait.
For the good or the bad, the gashmius aspect of living in E”Y has changed drastically over the past decade or 2, there is a lot less “sacrifice” to make aliya than there used to be.