Multiple property strategy: Cash, mortgage, both or other?

[Michael G.]

I am wanting to acquire numerous SFR properties under $30k during the next 12 months, and wondering how best to use my own cash and or finance. This would be for between 4 and 6 properties with a total value 140k to 200k.

Should I:

[A] purchase each with 100% cash, then allow my ownership to "season" for 6 to 12 months, then apply for a portfolio loan to cover them all under a single mortgage?

[B] apply for mortgages on each property as I acquire them?

[C] some other approach?

I want to stretch my cash as far as possible, yet still get the lowest practical financing cost for this number of low end, high yield properties. I have cash, and 800+ credit rating, and except for a primary residence have no other property, debt or mortgages.

Who else has done this? Any tips or suggestions? Thanks in advance.