Websites on cheap TLDs?
 

Where to register a large number of cheap TLDs? It doesn't even matter to me how much the renewal of such domains will cost, because I do not plan to use them for more than one year.

TLDs?

You can view domain names in XYZ ($ 0.92), .SITE ($ 1.59), .CLUB ($ 1.58), .UNO ($ 1.59) zones from https://pananames.com/ registrar. You won't find anything cheaper. Yes, renewal will cost significantly more. But if you use only a year, it turns out to be very profitable.

It is a pity that the renewal of such domain zones is quite expensive.

It may be more profitable for you to take .com, for example, if you need TLD for a long term.