Err….. Wow…. that’s more than “a few boxes”!
Apologies in advance if the below sound a bit harsh…
Where to begin…. honestly, stop buying boxes!
I would strongly suggest buying and reading the core rulebook, the Armies of Germany and Armies of the US, and the related Campaign books if you haven’t done so already, before you do anything else, as you’ve gone overboard somewhat! 🙂
Bolt Action is played at platoon level, so your army is going to consist of a couple of HQ units, a few squads (with transports if points allow), a few support units and up to a single tank – there are restrictions on what you can add in terms of support/armour in a standard platoon chart, plus further allowances/restrictions if you’re using a theatre specific one. Tanks are scary things in Bolt Action as in reality, not much can hurt them
There is also the Tank War expansion for playing big tank battles as well, which is where your tank platoon boxes will come into play, but for a standard game these won’t get used normally.

To give you an idea, this is one of my 1000pt German lists:
2nd Lt & Assistant
Forward Air Observer & Assistant
Heer Grenadier Squad 1 (10 man)
Heer Grenadier Squad 2 (10 man)
Heer Grenadier Squad 3 (10 man)
Sniper team
Heavy Mortar Team
MMG Team
Pz IV ausf H

That list will give me an evenings worth of gaming entertainment.
Whilst you can build your historically accurate lists, I honestly don’t see you using half of the kits you’ve bought already
Sorry if that sounds like I’m killing your ideas (I build crazy-sized armies as well for other games systems so I can understand where you’re coming from), but at 28mm using Bolt Action rules as they are,  you’re really not going to be playing the size of  games that use all this regularly enough to justify the expense from my perspective.