Used personal funds for literally everything.

I, personally, prefer not to be cash flow negative assuming 20% down on a deal.

Passive Investment - Buying and holding performing notes for interest income and or investing in debt fund/partials ownership Active Investment - Buying non performing notes to either modify to reperformimg or foreclose for real estate ownership; “working” the notes in your portfolio; or “creating” high yielding investments through various meansNote BUSINESS - Running a note fund; syndicating notes, buying and selling notes, creating partials, brokering notes, etc. 

It just depends on your personal situation and overall investment goals. 

However, I personally go 1 step further as many people have outsized debt obligations. relative to their income.

I do understand that most businesses are having trouble with labor these days but I shouldn't have to pay thousands of dollars because of my PMs problems. 

Now, I believe the right legal CYA move is to have one LLC for each individual property, but personally, I don't want to keep up with the bookkeeping on that! 

I use PropertyRadar for my business.

Personal Finance folks I've found have $5k minimum fees and such.

So, I borrowed the money from the person that stayed in my first house as she had just sold her house and made a fair amount of money off of it.