@Steven ParksThis would not be considered a contribution, it is loan repayment (principal + interest), there is no such requirement for this. 

And the way Bigger Pocket teaches investing those that follow core principals should be able to manage the hit with properties that are already own or atleast one would think so.Someone correct me if I'm wrong...

What is the liability on the MFH and your own principal home if getting sued?

I have met the principal, seen some of his other projects, walked the actual lot, etc. 

But to give you an example: if you are an aggressive investor, you will probably want to have as large a mortgage as possible and possibly put down as little as possible.On the other hand, I'm a conservative investor and I am much more concerned about protecting from downside risk and preserving principal, rather than trying to maximize projected return.

Many loans with Fannie Mae are interest only for 2 years and then you start paying principal and this gives you some breathing room during the value-add process.

@Jaysen Medhurst if I did 20% down , 4% interest , 30 year mortgage, according to realtor.com the mortgage would be $549 Property Taxes are $165 & insurance would be $65 , principal & interest $319 = $549

That said, the principals are very old.

The principal and interest payment at 6%  is $730.20 ( plus taxes, etc.).

That said, we like any business do get a few clients who operate on the "ready, fire, aim" principal.