EASY ~$150/day method. Good for safe/alternative revenue stream.

This thread is about making money off people looking for place to live.

1) Create website with properties listing, feeding off some major property listing sites from area you picked (build a bot or do it manually).

2) Website is focused on people LOOKING for flats. So make it good looking.

3) When user clicks on "Sign Up" button on your listing page (dont put any contact details there - hide them under "Sign Up to see more" button), show him splash message showing this message "This property owner may require Credit Report". On Splash Screen put 3 links:

-(Large Bright Green button 70% of field) Get Free Credit Report
-(Small Very Light, ugly Green with white letters on it button 25% of field - upload my own Credit Report)
-(text link below 5% of field barely visible - "No Thanks")

(You put 3 options so people wont flag you as scam and this increases referral rate and decreases people leaving on signup page. Under "Upload" option you put simple upload script that stores associated data account to uploaded file - you can sell it later to property agencies)

Now - your site will make money in 4 ways:

1) Getting people to fill Credit Reports to get deal.
2) Selling access to your database of users to property management sites.
3) After a while - making money from property agencies renting "Featured" spots

Getting people on your site:

Since you are not agency and not directly marketer - you can post to some classifieds no problem.
There are 2 ways of doing this:
1) Pretend you are agency doing apartment research 100% free as it is government funded. People like this, so they go with your credit checks easily. Post on CL or any local classified saying you are trying to match property owners with people looking for property for free.
2) Contact folks that post "Looking for" ads. Say you are government agency that is paid per rented property.

I am getting around 7% conversion rate through this.
My semi-English VA is able to post around 5 ads a day, respond to around 40 "looking for" classified a day and scrape around 15 offers from local classified sites to post to our site. I pay her $450 a month (she asked originally for $300 but she is solid - thus raises), and I make around $4,000 revenue just from one city. Easy profit.
Getting around 100-200 visitors a day through messages posted on classified.

I was doing this before a lot as an experiment, but since a year I focused on different things - so here you go, use this method while it last.

I would say this method is Grey Hat - once you get top agencies to pay you for your database - people searching for houses etc. get real offers actually so they wont complaint.

All this will cost you around $20-30 to set up (domain, hosting/CMS with hosting +manual work).