You're saying this whole plot is 4000sq ft, with a house itself that looks to be 1500 Sq ft

That house would be every bit of 40', not the 25' the image makes it look, plus the attached shed, and detached shed.

Source: grew up in exactly this design of house, with a 30x20 garden, on 1/4 acre. None of this image looks right.

It would also be a good idea to have knowledge on how to store stuff long term so they do not degrade and use meal planning so stuff is used before it is degraded