If i use Ride the Wind on a unit at Abandoned Hall to move the unit out of Abandoned Hall can I give it +1 Might from Abandon Hall before Ride the Wind moves the unit away?

No. Abandoned Hall's trigger only fires after Ride the Wind fully resolves — by then your unit has already left, so it's no longer "here" and can't be chosen for the +1.

This is the flip side of the FAQ #11612 ruling: when you move from one Abandoned Hall to another, you get the buff only from the destination hall, never from the origin. The "When a player plays a spell" trigger checks the board state after the spell's resolution is complete (FAQ #11430, #10497), and "a unit you control here" has no valid unit left at the Hall you moved out of.