Help,where do we site heat pump and all the gubbins?

[Selfbuildsarah]

We have come to realise that we may not have sufficient storage space for the heat pump, MVHR, solar PV and water storage gubbins inside the house. Being somewhat green we just accepted when our designer sectioned off a corner of the garage as a plant room without question. Could I have examples of where all the “gubbins” are in your house and how you managed to squeeze them in. Do they all need to be together or can they be separated? I imagine we can put the MVHR unit in the loft but apart from that how do you fit it all in? I haven’t seen a real life set up so have no idea how much space is actually needed so photos appreciated.
Attached is a very rough pic showing position of garage, plant room. Not to scale 🤣 at back and where we planned to put heat pump.