No, it is not. It is an adjective. Compound words formed with -like are practically always adjectives.
Professional
One adjective based on the related noun is operational. It has the adverb form operationally.
The adverb clause in the sentence is 'if we sell our house.' An adverb clause contains a subject and verb, a subordinate conjunction that keeps the phrase from containing a complete thought, and answers the question of how, when, or why.
Professional
Its being nice and businesslike.
The stem word for "businesslike" is "business." The term "businesslike" describes a manner or approach that is efficient, practical, and focused on achieving goals, often in a professional context. The suffix "-like" indicates that it pertains to or resembles the qualities associated with business.
the answer is busy
definition/restatement
If it's run in a businesslike manner, it can be.
A businesslike tone is professional, formal, and focused on achieving objectives or completing tasks efficiently. It typically involves clear and direct communication without unnecessary emotions or personal details. It is commonly used in formal communications such as emails, reports, or meetings.
Capricorn is too businesslike and Aries is too impatient.
Academic writing should be formal and businesslike.
By consciously thinking what to say and keeping a businesslike tone at all times.
The businesslike tone
Another word for efficient is competent, or businesslike. Hope I helped!