Welcome to the party AdventureDepot. This is what I'm aiming for. I've started re-doing them in A0, so I can have multiple assets per page. Then I'll select each asset (using paths), copy them, with & without grid to a new PS document exactly the size of the asset, and save them as jpeg's in separate folders; Starting Areas, Passages & Chambers. Then, once I have all the assets, I'll combine them into a PDF document using Indesign and load them up to the DM Guild... a bit of work but it only took me a half an hour at lunch today to do the basic floor plan of each starting area. I'm making an assumption that all passages exiting a starting area are 10ft and all doors are double. The chambers & passages will take the most work as there are so many possible combinations of doors and passages widths...I don't think it would be possible to cover every possible combination but I'll do a few variants of each.
Below is a WIP of the starting areas.