。
How about consulting a lawyer?
Literal
Lawyer [with-と] consulted-if how is (polite)?
~たらどうですか is the set pattern for 'how about X?' / 'why don't you X?' — a gentle suggestion that combines the ~たら conditional with a 'how is it?' question. Softer and more indirect than a direct imperative or ~べき. Very common for casual advice.