My property is huge and big enough for six units.I was told that I'd have to get a really in depth Survey first.

However I think you have laid out a more in-depth understanding of these traits than CM even has.     

If P&Ls were manipulated or tenant histories weren’t properly vetted, that’s a serious issue and could form the basis of a strong misrepresentation claim.

I actually made a YouTube video answering this question in greater depth, but I'll summarize here. 

Programs that market themselves as shortcuts often cannot replace the depth of understanding that comes from study, experience, and engagement with the legal framework surrounding real estate.Consider taking time to familiarize yourself with local laws and regulations.

There are some great webinars which go in depth to explain the details.

Then you can read a more in-depth book like The Book On Rental Property Investing by Brandon Turner or The Unofficial Guide to Real Estate Investing by Spencer Strauss.2.

@Thomas HaessigImpossible to really provide any type of in depth response based on information provided.

All I know is that it works.The key to accelerating a mortgage is to understand the relationship between the interest and principal portions of the payment and how to manipulate that in your favor.Going back and looking over your post, however, it looks like you used the wrong formulas in the wrong places.From my earlier post:For the interest-only HELOC calculations, build a spreadsheet like this:The results should look a little like this: 3000 3.75% 9.38 300 309.38 2700 2700 3.75% 8.44 300 308.44 2400 2400 3.75% 7.50 300 307.50 2100 2100 3.75% 6.56 300 306.56 1800 1800 3.75% 5.63 300 305.63 1500 1500 3.75% 4.69 300 304.69 1200 1200 3.75% 3.75 300 303.75 900 900 3.75% 2.81 300 302.81 600 600 3.75% 1.88 300 301.88 300 300 3.75% 0.94 300 300.94 0   51.56     We'll see how bad the forum software scrambles that.

The articles you read were posted by one particular investor who was trying to manipulate the other investors.