Looking for cheap proxy provider (unlimited Ip rotation , country selection )

Hello , im a bit bad at describing proxies , but i got used to IPRoyal , where they gave me the ability to add country symbol at the end in order to get an Ip from that country .
example : geo.iproyal.com:42xx4:ikxxx4:01xxxx05_country-GB
As you can see at the end they gave me the ability to change the Country only by changing the last Symbol and the Ip change per each request , and this heleped me so much in my automation process .

However Iproyal charge per Gb , and its X10 times the price i need to keep a good ROI in my new business .


so i would be so happy if someone can provide some suggestion about proxy providers ( residential or not ) that suits the following :
- which charge less than 0.5$ per GB , or charge per Time (weekly or monthly use ) .
- unlimited ability to change Ip ( per link change ) + ability to change the country easily .

and i need unlimited amount of Ip daily with correct country selection ( for threads , lets say 1 , after i will scale if the one thread price suits me )

i have heared about unmetered residential proxies , but would like to hear your opinion guys , thanks in advance .
Looking for a proxy provider , Unlimited Ip change ,easy country change, cheap GB , or payment per month or time .