Looking For Efficient BTC Flow (Beginner) – Hoping To Profit From DCA

I'm a beginner.

I want to set aside a few grand a month, on weekly increments into BTC.

I want the on-ramp to be as fee-low as possible.

But also be able to store securely within a good wallet. Perhaps hot initially, so no cost upfront like a Trezor.

I want the off-ramp to also be efficient, maybe even re-couping any transaction fees from earlier.

Essentially, I want to nullify or even GAIN my initial transaction fee losses – if any.

The BTC must be highly liquid, as I operate a Meta Ads Business.

TIA 😄

(P.S. Anyone can recommend a crypto card with cashback?)