"leon" wrote in news::
Please explain me how to make hi res images of 300 dpi and file size of 50 -100mb.
Buy a good medium format camera, learn how to use it. Shoot with fine-grain film, say ISO 100 or better, then pay for processing and scanning.
You might be able to get buy with as little as $8,000 USD investment. How much time it takes to get good images depends on your ability.
Cheapest image I find be over$ 200.00
Yep. Photographers like to be paid.
What are my options?
Pay them, ask them to donate at a lower price or free, or shoot it yourself.
I need those images to make poster of 22×80 inch.
You’ll need images larger than 100 meg if you are determined to use 300 dpi. That size with full bleed is well over 600 MB.
However, it’s usually possible to use lower resolution with something that large as people will be viewing it from a distance. You might try outputting a test strip to see how it looks from the distance you think people will be viewing it from.