IT partner for Web Services

Seeking a project manager (partner type alliance) individual or an outfit that will prepare the IT plan (to launch our service Virtual real estate inspections on the web), organize, execute and manage the web site entirely indepenedtly. Site should be developed and promoted to the size of Realtor dot com (2.5 million listings). Revenue could be better than For sale by owner dot com ($ 90.00 per month to $ 350 per annum), craiglist (free) etc. Budget given above is totally irrlevant. We just picked the middle number therein.