I liked your ideas.
After all if we need to fight against the Thalmor, the more cities and supplies we would have, the better.
Why thank you, Mechafist. The comment is much appreciated.
Just adding ideas:
4. Instead of paying mercenaries we should recruit either Imperial Soldiers or Stormcloaks
I'd think this would be an easy option: to garrison troops in your township in exchange for full support of that's faction's ideals.
But still, one should be offered the chance to go down a more neutral, independent path if they so choose to build their own township.
Which is why I mentioned mercenaries- because they create a personalised, relatable recruitment atmosphere for an individual patron.
6. There are a lot of Beggars in Skyrim, not counting of course the people who are passing a hard time, this people could work/live on the city.
Angi is a good example, if you helped the storm cloacks you could give her a chance to live in Helgen, if you Helped the Empire you could be able to arrest her.
Outlaws, beggars etc. while often seen to be good, fulfilling options for citizenship candidacy, can cause more commotion than is healthy.
So while I think they would definitely make ok fillers for the choices in someone's society, I'd believe there should be a radiant system to
determine whether they are accepted / start afresh in this newly forming township or once again having to feed off it's feet / elsewhere.
8. That's easy, theres no guard wearing a black version of the guard armor(The simbol of the city could be a dragon)
I'd think the choice is up to the player what they want their guards to wear, since it is *their* payed guards after all.
So no matter how convenient it is for a developer to just slap on a neutral-for-everyone t-shirt, it's not very creative.
Which makes me think that instead of the developer always being right, it's the customer = more options are better.
10. I think that's not necessary, just give the player a change to choose to what detities he want to build a temple

Well again, that's over simplification. Hell, I've played games which go into much more intricate details than those featured in my quote.
As well, someone like me, who doesn't want a whole DLC to be another reskin of the knights of the nine DLC, would much rather be
given the option of 'choice of deities' to be something rather minor; not the full blown deal. Which is much beside the point of running a town.
...unless you have a deep belief that gods play peoples day to day lives like a puppet show.
P.S. excuse me if I sound rude, I'm half asleep at the moment and so my moral grammarical compass or de-sarcasm meter is not available right now.