We have a two-day on-line class on exactly that topic in our fundamental curriculum, "The Essentials".

@David Clinton III That is a very creative way to find deals, however I am not totally sure what a title company is and how I would go about approaching them.  

He is good, but I'm totally new to the creative side)

I typically will forgive some of the interest or penalties, then use a 10Bii calculator or online calculator to come up with an amortization schedule.

@Bob Bowling if the lot rent is 200 and the home rent is 300 to get to 500 monthly total rent, minus typical expenses (33% of $300 for this example) this gives a 1982 mobile home a net of about $200 per month or $2,400 per year at a 10% CAP gives each home a value of 24K using an income based approach, which is overpaying - this home can only be sold for about 5K in the real world.  

The HELOC will show up as part of your total debt when they evaluate your assets etc for approving your loan.

I am already into it for 75k for lot acquisition/taxes/demolition bringing my estimated cost total to near 525k... you can see where I am running aground.  

This is an easy way to pass the coursework as it is open book and online, but I don't think it's the best approach to prepare for the license exam.  

While most Net Zero buildings are energy efficient, perhaps even highly so in comparison to minimum building code requirements, there is nothing requiring them to anywhere new the efficiency level of a Passivhaus   .... this is why you will see odd things like warehouses with large rooftop solar installations being able to claim Net Zero.On the other hand, Passivhaus sets three metrics which a building must meet to be certified as Passivhaus compliant:  The building must have a heating and cooling demand of not more than 15 kWh/m2 (4,755 BTU/sq ft; 5.017 MJ/sq ft) per year  and a peak heat load of 10 W/m2.Total primary energy consumption (energy for heating, hot water and electricity) must not be more than 120 kWh/m2 (38,040 BTU/sq ft; 40.13 MJ/sq ft) per yearThe building must not leak more air than 0.6 times the house volume per hour (n50 ≤ 0.6 / hour) at 50 Pa (0.0073 psi) as tested by a blower door.Ironically, the research and pilot projects which fuelled what eventually became the Passivhaus standard was carried out in Saskatchewan as a National Research Council (NRC) project in the 1970s (the house is still in use today) and a similar project (Minnesota?)

What's the total debt and total equity?