Quite a few of us are evening shavers. And I never found an issue with using an electric and cartridge razor, concurrently (not the same shave obviously Mick).
It used to take me half an age to shave, but now it is in the 15-20 minute range, including clean up and stropping. I did buy a D/E which I use once every 3 weeks roughly (that pack of 100 astras is going to last forever at 3-5 blades a year), and it may see a bit more use when I go to Europe in a few weeks. But otherwise I use a straight exclusively now, and I shave daily, as I said at the start I am an evening shaver on work days but a morning shaver on my week off.
I strop post shave, it dries my razor, and it is ready for use the next day.
But if for you using a D/E on weekdays works then there is nothing wrong with that.