Per @CarlKeller
True grass fed and grass finished beef is one quality point but, it might not be the most important.
There’s a $20 grass fed grass finished steak on the shelf and similar sized $4 and $7 steaks on the shelf - which do you pick? If you are totally price sensitive, the choice is obvious (and that is all of the thought some people put into this decision).
The question is, what are you getting to move from $4 to $7? If the $7 steak is from a reputable company and claims to be antibiotic and growth hormone free - it might be worth the upgrade if you suspect the $4 steak might have those along for the ride.
But, if money is an issue - the ride up from $7 to $20 might be too long of a trip. The two main points there are supporting the idustrial creation of meat and a different fat profile (some say that difference is small but, of course, even small differences done daily might have larger than expected effects).
So, if going Carnivore, you might do a little research about what you can get in your area at different price levels. Even if you stick just with Keto - your time won’t be wasted because you’ll probably have a little more cash to spread around on the better meats.