There is no guaranteed 500 foot WiFi. Even a single Ethernet is rated at 100 Meters.
For such a low budget why not your smart phone as a hot spot? The data for such use would be minimal.
I just started a small business and take credit cards thru my phone. My router is inside my home by the desktop, but when I'm out at my shop I get no WIFI. I don't like having to go to the house with the customers cards. Would rather do it right there.
It is a total distance of less than 350 feet with not a lot of obstructions. Been looking at repeaters, boosters etc but it just gets confusing.
I am on a small budget so cost is a factor also, but what would be recommended to get WIFI out to say 500 feet?
Thanks ahead of time for any help!