I like the goal, but imagine the noise pollution with the sky full of whirling blades. Also, incredibly power inefficient.
I think it would be better to let cars and trucks keep doing what they’re best at, and instead make public transport so good that last-mile delivery is the only thing left on the roads.
You don’t have time to have a kid before this surgery if it’s in January, and I don’t think either of you want this stress.
Best cast scenario, it’s not cancer, move forward however.
Worst case, you have to decide between terminating the pregnancy or removing the cancer.
And the inability to have biological children does not preclude you from becoming parents. Yes, it’s a much more complicated process to adopt/deal with surrogacy/etc. , but you’re not completely cutting off the option to raise a new generation.