As to finding a female singer: I found my last one by going to Karaoke venues and keeping and eye and ear out for one who would like to join me and who
would bring added value to what I was doing. We had at least 6 productive years as a duo with strong bookings....until the "recession".

As for working with female singers:
My last 4+ group was in the early 80's and each group had at least one female singer.. For the next 15 yrs I worked as a duo with a 3 different female singers.
I'm not saying there wasn't a problem here or there, but, for the most part it worked in both our favors. I was able to charge enough to cover their pay and
sometimes more.

We got clients who would otherwise not have wanted a single. The variety of lead voices was a plus and kept the show from getting too much of the same ol'
same ol'. And the background harmonies we provided each other were a real plus over digital harmonizers.

The only major downside to performing with others for me has been the scheduling of rehearsals...especially when the other person(s) live out of town. A big plus,
however, is having a singer to rely on when the other one is sick or otherwise can't sing.

That was then. Along came the "recession" and it seemed all the clients wanted to negotiate the fee down. I had no choice but to book myself as a single
if I couldn't get the duo's fee. Now, my last singer has retired and I have been performing 100% single for several years. I won't be seeking another partner.
It takes more effort and time trying to find the right one, get the act together and book it. But, I do miss having that re-enforcement and additional talent on stage.

Eddie