TFP- Time (their modeling time) For Prints (Digital Edited files with usage rights)
If you're serious, I can give you some tips. If you're interested in booking clients, discretion is MANDATORY. Hire some more mature (think 30's and 40's) professional models who have the skills to convey your message/branding/style in order to build a portfolio of work. Marketing? Relationship sites, catering to the 30's + crowd. Up your retouching game or be prepared to build a relationship with a professional who can provide your style and quality on a consistent basis.