Assuming I do race to Indy and park at the start of it...
I could get the mil from the three options in Indy before/equal-to Police Station.
I could get the prod from the three options in Indy before/equal-to Police Station.
I could get res from HMA town houses.
...
Then to get regular Progressive Tanks, I could use any of my earlier age goods techs plus...
...one of the two decoration techs that are equal-to/after Police Station.
...
Am I right that the remaining 7-9 techs to get to FE or 16-18 techs to get to OF are all just any generic tech? Because in that case I think I would be safe.
...
Worst case, I get my Hovers in FE (which makes the rest of higher age troops less important).
Best case, I get the Police Stations early, during an event, and I have more flexibility with the Indy techs.
Thanks so much, Uber! I composed that reply above while researching the guide (the guide literally gets better each time I read it, because you're always improving it, thanks!) so, just leaving it in place.