Does my down payment have to come from my business bank account?

Then packaged a few such properties together, went to a bank and refinanced them out and then tried to find a new property to put those private lenders on.Admittedly, we usually left some of our own money in the properties (our average all in price is about 82% of the ARV) but we had some money to work with which not everyone does (why I recommend house hacking to start for most).

I've had a career in engineering, banking, international insurance and real estate investing and loved all of it.

Not a lawyer or tax person or anything. 

I am hoping to see how I can purchase another property without dipping into my personal funds.

Personally I see money orders as a pain to deal with both for the tenant and for myself by adding unnecessary steps. 

We personally won't look at a deal where we don't think we won't make at least $50,000 after all expenses and closing... and truthfully we are usually wanting closer to $100,000 or more.  

There are a ton of CRMs out there, but I personally love Zoho and how customizable it is

I personally prefer to start now, than later.If you can afford a duplex financially with a bank and rent the other half to pay for most of your mortgage, why not?

I'm not sure if DSCR limits the number of structures per lot but if so, and you are indeed talking about multiple structures on 1 lot, I think that a commercial loan from a local/regional bank could be a good fit if DSCR won't work.