To debt or not to debt?

[Brock Y.]

I own properties that are both paid off and those with a mortgage. My DTI ratio can withstand multiple mortgages but I was hoping to get input as to what route to go.

Ex. Would you purchase a $200k property with a cash flow of 800/month putting down 20% and having a mortgage OR purchase a $50k property with a cash flow of $250/month paying all cash? 

I plan on buying multiple properties and was wondering if buying ones on mortgages first then others with cash would be better or vice versa. Any input is appreciated. Thanks.