I'm looking to get a web site for creditability and lead generation for buying distressed houses.

The end result of this is that BP would essentially act as an opt-in networking broker for all parties - you opt in to your interests, people with something to offer could then easily identify those who are seeking it, and then there is a final opt in for being recruited into a private list where user-generated content and deals are housed.While the above idea may or may not prove to be full of holes, I think BP has huge potential to grow into the go-to network management tool for investors.

They generate between 5% and 7% depending on the currency exchange.

There was a time, not too long ago, that it felt like everyone was looking for the passive income that can be generated for having 1 roof and 4 individual units.  

Bandit signs generate calls, but did they generate closed deals?  

But my goal with REI is to generate passive income so I can become financially free.

Appreciation (generated by inflation, demand for properties and forced via rent increases)3.

-tvs https://www.tenantverification.com/  tvs was the service I'd use to run credit/criminal/eviction checks on prospective tenantsas for the others, a I would track a lot on spreadsheets or databases I keep. for estimating area rents, I wrote an script to pull all of the rent info for my area, parse it all by city/town and in some cases neighborhood name, then use the data on rent, square footage, and number of bedrooms to generate averages and watch trends in the rates for each area. 

For example, two houses generate a passive loss of $2000 and two other houses have taxable income of $3000.

If not, you'll need to give a discount on those spaces based on the anticipated rent the lot will generate through the year.