Heloc or cashout refinance - inflation concern

[Kam Nak]

I have almost 300K in equity that I can leverage from my primary residence with a HELOC or cash-out refinance. When I spoke with my banker they were suggesting me to go with cash out refinance because of the current concerns about inflation and interest rates skyrocketing with a HELOC if inflation goes crazy. My goal is to buy investment properties on a recurring basis.

Is anyone in a similar situation or what would some of the experienced folks here suggest ? Would really appreciate any ideas