I haven't met a client who choose or don't choose me because of my gear.
Nowadays, I shoot mostly on 1 body and 50mm for indoor and 135mm for outdoor. So I will bring 2 lenses with me most of the time. It makes it really compact and small.
I use a tiny little bag and no one has said anything to me regarding to my gear and I have never been asked about my gear up when booking my service. Don't ever sell your service by telling people what best camera equipment you use. In another word, you are telling your client, "well, without the gear, there isn't much I can do".
Just use something that you are comfortable with and within your budget.
Camera is a tool and please, it is not an investment as they depreciate rather quickly. Buy something that you can use and make the most out of it.
If it limits you, you can change to other that fits your requirement.
If a camera worth $5000 and it gives you 100,000 shots, they are roughly the same as you send an sms. still cost you money to shoot so camera is a liability not an investment.