In my mind, there is lots of good advice on here.
My mind also tells me that if you are serious about this and going to buy one, there are numerous things to consider before purchase, as it can be a huge investment depending on your current and future needs. Just some of those things are:
Is it possible that you will ever want a 12v/120v fridge/freezer ?
Do you plan on being remote for any length of time ?
Do you have or plan to have any type of system in your vehicle to recharge it at more than a snail's pace ?
These are just a few things to seriously consider. If you answered yes to any, you will/should also consider solar. It helps you stay in one place, unplugged for longer periods and helps your batteries last longer if you don't have a good recharge system. Also of note, every single vehicle that we have had, did NOT have wiring that was up to the task - especially 12v outlet wiring. I won't mention the manufacturer but we recently (2017) had a vehicle that the dealer said it was fine for running our 50 at ARB fridge/freezer, but in reality it melted the vehicle wiring and was literally seconds away from catching vehicle on fire. Which is also the most preferred overlanding brand. I got burned trying to disconnect it. It was already melting both the 12v vehicle inlet and fridge plug. Luckily fridge is fine and we no longer have that vehicle (it didn't tow good anyways).
But since then, I always run 10 ga wire directly to the battery for the fridge/freezers. Never had a problem since and the wire doesn't even get warm.
It is getting more and more difficult for DIY'ers to do electrical things to modern vehicles. I can't even put a high output alternator on our 2019 ZR2 diesel Colorado. It has a "smart" alternator that I call a "dumb" alternator because it is tied into the computer.
I don't have the money to pay for the good stuff, like Redarc or lithium batteries, and certainly not the money to pay someone else to put a system like that in our truck. I made up my own system that totally bypassed the factory electrical system and it's huge shortcomings. It works fantastic for us. I am not an electrician but educated myself enough to do it myself.
Good luck with your endeavor and keep us posted please.