Hello Folks: Been dreaming about a new PC again and working my spreadsheet for option decisions.
There are several items that I realized I just don't know what they cost or if some of them are worth considering.
Here is the short list of items I am still up in the air about. If you know about their approximate cost and don't mind sharing, that would be great.
If you have opinions about their worth or practicality that would be appreciated too.
Hope you don't mind me asking all these questions, fact is we are still a bit away from calling PC and pulling the trigger and this is just my way of making it real

Upgrade to Maxx air 00-07000K Will most likely do, wondering on cost
Advanced AC upgrade Will probably do at least one, maybe 2 depending on cost
Alcoa wheel option Like the look, wondering cost and maintenance requirements
Upgrade refrigerator to 12v compressor Thought I wanted this but not sure why
Auto Gen start Do not need now, but if reasonable might consider for a future pet
Truma combi HW Comfort plus Never ran out of HW w/ 6 gal DSI but this sounds cool $$$?
Central vacuum Wife would like it if they work like home.
6" longer option cost and benefit Would love the 6" longer DS bed and extra counter space $$$?
Safe-T-Plus stabilizer Thought this was standard but can't find it on PC site.
Lagun swivel tables Want these, just curious on cost and credit for std table
Best regards, Jim Godfrey