When you have a professional position which involves selling, you have skills that are transferable from industry to industry. The specific product is not usually the key for the salesperson to be successful, as long as the salesperson stays true to themselves and likes and believes in the product or service being sold.
To sell timeshare or vacation ownership, most successful salespeople probably should feel comfortable with the concept of being paid on a commission-basis more frequently than being offered a salary. The salesperson prepared to get paid by commissions usually knows how to balance their at-home finances so that the fluctuations in paychecks will not put their bills in jeopardy.