I find with marks on the tiled patio out the back of the house I don't need to level/polar align at all. Just a one star alignment on a saved calibration gets me going good enough to image with autoguiding. That is, unless I've just been off to a dark site and fiddled with azimuth or altitude - then it needs to be realigned for a while....
Perhaps give it a try - you might be pleasantly surprised.
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