I don't think the price between lipo and lifepo4 are not that great for smaller cells like 18650 ASO.
BUT ! i think i would go strait to a larger lifepo4 battery with build in BMS
You can get a 12 V 20Ah / 256Wh battery for 225 USD ( that's expensive Danish price converted to USD )
Then you also need a 10 - 15 A charger as it can not charge as fast as a regular car battery.
Wham Bam thank you mam, and memory card size will be your #1 problem if you park a long time.
Actually i think someone should make a charger / wiring kit for these batteries, and sell those
And look !!!!! you even get BT with the battery so you can monitor your power,,,,,, as if people don't look at their phone enough while driving.