The stuff I mentioned can be bought in 5kg bags which will last you a month at least - depending on how much meals you're replacing - if it's all then you'll probably go trough more - you can pre-mix a week worth in a standard plastic container and shake in like two minutes.
The major time difference is going to be in figuring out how to do it the first time - but this is time well spent if you want to balance your nutrition (figuring out how much protein/fat/carbs you want and how many calories).
I'm in the same boat - I don't want to cook every day or eat out all the time - this is convenient and works towards my fitness goals. Throw in a multi vitamin, fish oil and some fruit/vegetables and you got a easy to do fast and cheap diet for building muscle.
As I went vegan I went from benching 120 to 200 with about 20% protein intake, and it was fine. We don't need shit tons of protein that everyone says we do, Soylent has a nice ratio of it.
> good luck with that if you do any physical activity
> close to a competitive
> on recreational level (how is this is even a thing? "competitive on a recreational level"?)
> you won't look like you lift
You've just substituted "any physical activity" for the "do you even lift bro" culture. Please don't do this and try to understand that the majority of people don't need or even want to be bodybuilders. For them Soylent is A-OK.
20% calories from protein is fine. Even for a strength athlete, if you are trying to gain muscle mass, 20kcal/lb and 1g protein/lb is a reasonable set of macros, which indeed is 20% calories from protein. A lot of bodybuilders will go up to 25% or even 30% from protein, but that's on the high end and certainly not something that would make sense for non-strength athletes.