building a worldwide lodging/vacation rental site different from others

Building an affordable site in the appropriate format. Confidentiality and non-compete agreement required. Cooperative personable person to help us in this project. Consultation on how and why the particular format is needed, considering plug ins, ability for us to add to and modify without great expense, or lack of functionality needed with different platforms (Wordpress etc. ) Budget is in the bank, but must be justified as marketing will be the main expense for this risky endeavor. We'll be building a similar site to most lodgin/vacation rental listing sites such as [login to view URL] or Homeaway etc. on a more humble scale. We need it to allow subscribers a format and template system to easily list properties, provide descriptions, pictures, videos and of course contact info and forms. Subscription fees to be paid online at various levels depending on exposures, free for a simple listing, but no reservations or booking commissions involved. Referral only. A specialty site marketed NOT by location as all the others in the world are; but by the priority of information needed and determined by the user in the priority THEY need and desire. That priority is variable with each inquiry: budget, number of people, setting or activities supported near or at the property, family child or pet friendly, sleeping cooking dining arrangements, formal to rustic accommodations, smoking, parking, snowplow, lake or beach proximity or access, entertainment or attraction proximity, etc. Only after that: location, price, dates etc.