You can look at the market place on this forum. I now use 💎 Mobile proxies • 20$ month - Happymedia.pro: Static, Rotating 4G/LTE Mobile Proxies
The first 2 examples you mention are very expensive. Your last example (highproxy) are datacentre proxies, not mobile proxies.
You should also think about your staff needing to have their computer on all day to run the software. And you probably need to use scrape accounts also (can be on datacentre IP’s).