Teams in the future

So basically I'm thinking about doing a secondary team, do you guys think it's worth it? I would use the same formation and tactics, and I could swap the teams each game so I don't pay for stamina refill, my current team is batista gk 193cm 88, mendy 84, dumfries 84, godfrey and hanche Olsen 84,wharton 86, rabiot and tonali 88, balogun lw 87, David 89, Cho 85 (ill buy mbappe to swith him), I wanna buy a Portugal national team what do you guys think, I wanna buy mbappe and messi for my current team but at the same time I would like to start building a secondary Portugal team, need some opinions