Suggested

Headquarters boost

I would be willing to spend money on a headquarters boost, I would pay a fiver for example reduced time for a week, doesn’t have to be that obviously but you get the idea ?

Maybe price tiers that give 25% 50% construction time reduction. 

Just a thought as if it was available I would of bought it as I’m impatient lol

You can..... it's called tokens......you have an option to instantly complete a building.......you can buy them in the shop or earn them through your sponsors.

Yeah this wasn’t my idea… thanks captain obvious ?

I was thinking long term and real cash payment instead of tokens

Here are same suggestions in german. 

https://igpmanager.com/forum-thread/48522

If you want i will give you a short description in english.

Sorry, but it does seem an unnecessary addition.  You buy the tokens with cash and then use on headquarters.  Takes you about a minute to do as it’s upgraded instantly   Why would real cash payments for just a time reduction be better or more long term?

My idea is general there’s tons of way to structure it, I would pay £4.99 for 50% reduction in time over a period of 7 days,

That’s just an example without real thought. 
The idea is good you just need to find the balance.
Also I save tokens for drivers so a real cash option would be good. You have a training one so why not something similar? 
Like I said I’m just spitballing the idea this isn’t exactly what I want implement, I’m sure there is something that will be popular given some thought.

This already exists, in a special offer (available via home page) i believe it reduces building time for real money

Oh I did not know that, I’d never actually seen it, only training. Thanks