One cannot tell if he has something like that in mind in the future, coaching a national team. We all know how Guardiola is full of action day in day out, by joining a national team to coach them will limit him on some great plan of action he’s always into throughout the season. As an adventurous coach, he might like to have a taste of the national team too, but for now, I think he’s still in his prime and will want to add more trophies to his name before considering coaching a national team now. No doubts many national teams will want him to coach their side, but he’ll be very skeptical on the final decision he’ll make on the team to coach. Which team do you think he’ll coach if he’s to coach a national team??
Which will offer a lot of money 
I think it won't matter much for Guardiola which team to train. The only thing that will surely be crucial for him is that this team is from among the top and therefore there are real chances of winning titles. Nevertheless, it is quite problematic to buy all the players you like into the national team I think that Pep will inevitably someday be ripe for the idea of trying something new and coaching some national team.