Which Dasha with Antardasha is good for marriage? Surely it's Sun and Venus is good, but Saturn?

What are your thoughts? I will have my Saturn in 2 years from now and that will be 20 years of Saturn Dasha, I would be 50+ if I don't, It sounds funny but would it really matter? Even "If" your Mahadasha is in Ketu but since you are at age of marriage, unassumingly early/late 40's or maybe 50, would you consider waiting to finish the dasha? Or you guys do Ernst predictive transit tools to show which is best, even though it's not a good dasha? Also, other thoughts ( do we have to depend on dasha or atleast predictive for these? ).