it's not about the price, but really the liqudity

As brightline said, you may just incease the quantity to achieve 1#1. leverage and #4.delta. for #3, quailty and price might have correlationship, but are not determined by each other (UNH?).

so yes, buy leaps with high quality and highly liquid assets, but high price sbhould not be a factor. Many index ETFs are with low price but high liqudity.