How to manage a hundread PCs in different Area?

Guys,

I know this is pretty OOT, but this is the forum I know that actively help the n00b like me

If you have to manage a hundred PCs in different area, what tools will you used?

I know remote control software like TeamViewer can help, but I dont have much budget for that

not saying the inconvience of keep note of every PC's teamviewer ID and password on notepad.

Since I'm pretty active develop small AutoIT script to used to those PCs and I update the script regulary,

I imagine how can I distribute it to all those hundread PCs without manually copy them one by one?

I know there are some remote control software created with AutoIT, but can they be used in this situation?

I believe there are many large company IT guys here

I need help

Thanks in advance!