yeah - as noted above, it's all about the contacts.
My main band atm is an Ozzy/ Sabbath trib that I've been doing for 12 years or so.
We started small and have built it slowly over that time, but due to the sad news in July, things have been mental.
Also through some of the contacts I've made, I pick up work depping with a Metallica trib show among others.
IMO You're better off finding an iconic band that ideally doesn't tour here or very rarely comes here and forming a band around that.
JMB can be useful as can forums similar to this