Of course, I don't want to break the law at all and my understanding is that if I left my job and didn't disclose it before the 'loan is complete', I'm at risk of committing loan fraud.

These are usually reserved for large loans where the risk mitigation is built into the purchase asset or business itself.

At the same time, you can be improving your personal finance position to have a solid foundation for investing and taking calculated risks. 

Not only is there a high risk of water damage there is also the risk of a improperly installed unit falling and injuring/killing someone.

It really depends on what you are comfortable with, a lot of people will go the commercial route or explore blanket loans if they want to be the most efficient others would pay down some mortgages to mitigate some risk, it depends on what you are most comfortable with. 

Class D,F should be all electric to minimize fire risks (leaving stove on etc) a Class A properly might expect a gas stove.

The best way to scale up is to sell any SFHs and purchase multi units(5+ units value driven by cap rates).You could continue buying SFHs but that will only increase your work load and risk. 

There's always risk when dealing with turn key companies because you're dependent on them for everything starting with property value and pro forma all the way through rehab and leasing. 

Of course the property has to be a good deal sorry forgot to mention that.Assumptions:-Property cash flows from moment bought-Will force appreciation through minor rehabFollow up question:I thought if we had a property fully paid off, that has a higher risk since I will be targeted more?

I figured there was something I was missing otherwise the only strategy would be contract for deed to mitigate the due on sale clause risk.