unlike a lot of bands, Journey had plenty of hits that would let you cover a 2 set show, with a few tasty deep cuts thrown in, and of course Steve Perry solo stuff. If you are good in both sound and look, and you don't have another preeminent Journey tribute in your city, you could do very well. You should get an agent too.
Tribute bands for the most part are not bar bands. You're not going to attract enough "uber-fans" to play 3 full sets of one band and hit the same bar every month. You have to shoot more for festivals, larger venues, and be willing to travel. And a lot of this really requires an agent who specializes in tributes. We use three of them.
so it's different. Let those that sneer at tributes sneer. but I never made more money as a bassist, or played larger crowds, than when I did tributes. it's a different animal.
but it can't be a tribute to just anyone. I know people that have tried to tribute Radiohead...or Queensryche. it made no sense. Even Rush, who I love. I've seen good ones. but there simply is not much demand. Not enough recognizable tunes to create DEMAND for the tribute.
and that's the dilemma. Tributes that do great or to ICONIC bands. Bands that had a ton of hits over a long period of time: The Beatles, ACDC, The Stones, Bon Jovi, Queen, Kiss (to some extent). I know a group that does Sabbath and Ozzy (and the guy really looks and sounds the part). He does pretty well although I have seen that metal tributes have a hard time booking. and yeah Journey is a popular one to do. The problem? The iconic ones already have a ton of tributes all over the globe and many are willing to travel and will drop into your city and take that big gig. so if you do a tribute that's popular, expect competition. If you are mediocre at what you do, you won't get far. If you do the songs, but not the look, you won't get very far. You have to have look and sound to the extent possible. if you can pull off two tributes, it makes booking easier too. You can open for yourself.
It's a tough genre to go at, but the rewards can be really good too. If you're good, you'll do more and get further than any cover band, and far more than the vast majority of originals.
Good luck