This kind of problem is not about funds because the problem is, whether Pep or Ancelotti can accept Manchester United's offer? After all, I'm sure Manchester United have the money to recruit one of these coaches, but I'm sure both coaches will refuse to offer from Manchester United. After all, the previous rumors were also about Zidane but in fact Manchester United did not succeed in getting him and even worse, Tuchel also rejected Manchester United's offer. So the point is, about being able to accept the offer submitted by Manchester United or not because if it's about finance, I'm sure Manchester United still has good finances and is not bad like Barcelona.
Manchester United has reportedly offered a new contract to ten hag, so it seems difficult for us to see a new coach change in the next few seasons happening at Old Trafford, currently Guardiola has 1 year left on his contract with Manchester City and even if he leaves Manchester City of course he will not betray Manchester City just because he joins Manchester United, In addition, as you said, if Guardiola still wants to coach a club, of course he does not coach a different club in the same league, like when he left Barcelona and Munich, I personally believe that if Guardiola will coach another club then he will go to Serie A or Ligue 1 later.
While the possibility of Ancelotti coaching Manchester United is certainly impossible, because previously Ancelotti has said that if he is currently focused on Madrid and wants to end his contract at Madrid before he retires as a coach, Ancelotti has said that there is nothing more which he is looking for as a coach because he has achieved all the achievements that exist today.
To be honest, I see it may be difficult for Manchester United to get a top coach at the moment, so indeed they still retain ten hag as coach even though so far there has been no impressive achievement that he can give for Manchester United.