At this stage of Ronaldo career I don't think he will prefer to be in small club, what Ronaldo needs right now is a big team or average team that is in the Champions league that can an advantage to his career. I know if it was possible for Ronaldo to go Chelsea he would have done that before now, Chelsea will be a good club for Ronaldo to be.
The problem is not where he will go in the summer transfer window, but which club wants to sign him with underperforming plus he is 37 years old, a big salary, and he only wants a team that enters the champions league.
Regarding Chelsea, he has been rumored since the transfer window last season. however, until now no one team is really willing to bring him from Old Trafford.
I've read on several occasions while Potter was being interviewed, so far he isn't thinking about bringing in a newcomer in the January transfer window. however, the opportunity exists and Chelsea are more interested in targeting Victor Osimhen.
Ronaldo is a great star, but his performance is very much declining. and for now, ai has to prove it first with a very impressive performance, he has to show it at the world cup event in Qatar later.