And there are local (city, county, and state) requirements that are more stringent than the Federal requirements - not only for performing work, but also for disclosures.My question is: What type of seller actually agreed to perform lead paint testing?

Using the marketing efforts your already implementing to convert the ones that don't quite meet your criteria into listings.

What happens then if you wanted to implement the snowball effect and at some point take out equity in the property, refinance, whatever it is in order to purchase your next property?

Those are generally local banks with more stringent requirements on loans as they know the are is more risky ( less population, less growth, older towns,lower median incomes, aging population for workforce, etc.).At play also is the focus of the lender.

From an asset protection standpoint it is also a bonus that you can implement more anonymity because you can have your attorney sign for the land trust, removing your personal name from public record.This isn't legal advice, just my opinion as a real estate investor.

.)- Do it againIt works very well for me, especially that i also travel alot since my day job is in the consultancy industry as well (Software implementations). 

I will attempt to implement your advice and convert from % to actual cash in my next analysis.  

Looking into implementing within the next few weeks.

I know a lot of my friends with pets are charged pet rent, and it's something I'm considering but haven't implemented yet. 

After 30 + years as a real estate investor, private lender, speculator and small developer, I can tell you that many of these hyped systems CAN lead to a highly profitable deal - but - the requirements are always understated by the promoters.Almost all these "systems", which are actually very common deal types to experienced investors, require the following to be implemented successfully1- A good deal of cash or access to such (not including mortgage money on property being acquired)2- Significant directly relevant experience (much, much more than what can be acquired through purchase of the book, seminar or mentoring system)3- Deal analysis and deal making skills4- Time - to spend on finding, negotiating, performing due diligence on, etc. potential deals - usually at least 20 hours per week.5 - Persistence - to evaluate 100 potential deals, talk with countless people, make unlimited phone calls only to have 99% of your work lead to a rejection.This is why my empirical evidence suggests that the satisfaction rate of those that purchase these systems is way under 10%.