You should just sped the time to calibrate your first layer. You do not want to start, pause , and adjust every print. Spend the time to do it right once then you will almost never have to touch it again.
I think you will find the mechanical way is much easier than the “auto level” with sensors. The best prints are done with auto level off. Auto level drives your z axis continuously, with a non-autolevel printer it just moves up one time for each layer, The less axis moving at the same time the more precise your parts will be.