Lots of fun.This is pretty comprehensive, but somewhere to start looking for literature is the following:http://www.biggerpockets.com/blogs/4342/blog_posts...Valuable info to share: participate on BP, ask/answer questions on the forums, get out there and meet with people, stay at it.I am closing on my first buy/hold within the next week.

@Jeremy Keeler the data on Neighborhood Scout is about as comprehensive as I’ve ever seen.

Here is my list of comprehensive items to account for when evaluating an investment: 1) Mortgage2) Mortgage insurance (PMI or MIP) or FHA Risk base3) Property Taxes4) City Taxes5) HOA (Home Owner’s Association) Dues and Fees and Assessments6) Insurance Property Hazard InsuranceFlood InsuranceEarthquake InsuranceUmbrella Insurance7) Vacancy Rate (usually 8% - the equivalent to one month a year, or 5-6% if multifamily and/or if experienced, if not use 8%)8) Utilities (you’ll have some or all of these if your tenant is not covering them and/or during vacancy) Water § Sewer § GarbageElectricityNatural GasPropane9) General Maintenance (usually 5%) Upkeep § LandscapingSnow removalRepairsNew Appliances10) Capital Expenditures (usually 5%, higher is the property is old and obsolete, less if fully rehabbed and all mechanicals and roof are new)11) Property Management (8%, even if you self manage, your time still has value and there might be a time when you'll want to be completely hands off or you'll not be able to do it, vacation, retirement, etc.)

Let me rephrase the question; what is the most comprehensive source for all real estate transactions?

Attorneys have comprehensive knowledge of both federal and state legislation associated with real estate law. 

Only a primary HELOC, which was awfully thorough, comprehensive, a bit long.

You use your own personal cash flow + the income produced from the investments to pay down the leverage in a matter of months and then reinvest it again and again creating a "snowball" of income.There's a pretty comprehensive video on the website (The Income Snowball Video) that goes over it or feel free to google the patent!

Andreas Riha - We put together a very comprehensive guide on tenant screening which I think you'll find helpful: Tenant Screening: The Ultimate GuideTake a look and let us know what other questions you might have.

You're dumb with math or your basic comprehension skills are below a 4th graders.

The problem is we live in a very complex and integrated world and most of the issues we face are complicated by nature and require a more comprehensive solution than "always do this" = problem solved.