From what I read, the Ford solution is around 9-10k by the time someone gets done with it, and I saw a video from someone who has it which showed it in actual use and there isnt a chance in heck I would want what ford has cooked up there.
I do have solar + powerwalls already myself, but wont be buying a cybertruck (I think its hideously ugly), but the power portion of the discussion somewhat interests me (I am the main mod for the tesla energy subforum, lol).
Anyway, I saw that those foundation series cybertruck orders seem to come with the install of the equipment necessary to make this work, but from what someone posted, the semi-fine print says (paraphrased) "credit for up to 4k install, anything additional is owner responsibility", which says to me that the average cost Tesla must be planning on charging for setting up the powershare function must be around that 4k figure.