I've had a bit of fun in this thread so far, but this is my take on the situation.
When the season closes, Poch will have 3 good offers on the table. All with their pros and cons.
Real Madrid
I'd say this is the riskiest option as it's the most cut throat job.
You're up against Barca and if you go the season without a trophy, be it the La liga title or the Champions league, you run a big risk of being sacked.
They've got a bit of a rebuild on their hands as they have some aging players, so the transition could be quite the pain for any manager who comes in.
On the flip side, you're taking over one of the biggest clubs in the world, with the best trophy collection.
It's a big job for a big person, that comes with a lot of pressure. Few survive it.
Man Utd
I actually thing this is the best risk / reward job of the three.
You come here, you're expected to deliver, but finishing in a respectable position won't get you fired. The longer you sit in the seat, the more that pressure would build, but for the first few seasons, if you manage to get CL football, you'll be safe.
You'd come to a squad that is already talented, that in my opinion have been held back, but we clearly have a very good foundation to build on. On top of that, we can offer the same sort of budget Real can offer to bring in the right players for his plan.
The reward comes with we are a club that wins trophies. We have the budget to compete, and if the man in charge does his job properly, there's no reason he can't win here
Spurs
This is the safest job of the three for me.
I don't think Levy is that expectant on trophies. Poch could finish top 4 for the next years, win nothing and would keep his job.
Not saying that's a bad thing, but it's definitely a safe job.
He's got a very good squad and with all the new amenities, he could definitely be a main figure in Spurs future success.
The biggest problem he faces, is the lack of financial power.
The budget to improve the squad. The wages to keep his players.
Not saying they are, but Spurs could be a bubble about to burst (I don't expect it btw)
Eriksen is digging his heels in. Toby doesn't want to sign and has a low buyout coming up. Both players could leave cheaply and replacing them isn't cheap. Is Levy ready to replace these players or would Poch have to find another gem and hope it works out?
My opinion
I think he has equal chance being at either of the 3 clubs by the start of next season.
As a United fan, I actually think the biggest risk of us not getting him would be him ending up at Real.
The positive for me is that I think the cut throat attitude at Real could put him off. At this point, I think we're to big of a club to turn down.
You can argue that Spurs have a better squad etc, but in reality, 2 years ago, we won the EL and League cup. Last season we finished above Spurs. This season, we've struggled, but I put that down to Jose, and I believe that is the reason why. In reality, we've had some of our worst years, yet I'd say we've been the more successful club in that period.