"I accept PayPal payments." You can use this in any basic communication with people who may hire you to perform. This simply outlines your preferred payment method. You can also phrase this statement as : "I accept PayPal" or "PayPal welcome". These phrases would be best suited to written communication like emails, or on a website.
"Would you mind paying me through PayPal?" This can be used when speaking with anyone hiring you for an event. You can also use it in an email. Alternative phrasings of this are: "Can you transfer the monies to my PayPal account?" or "Is it possible to receive payment via PayPal?" You may need to explain that this is the most convenient payment method for you. You can say: "Would you mind paying me through PayPal? I think it is the best way because we don't need to worry about currency conversion."
"Payments gladly accepted via PayPal." This statement can be used in written communication and can also be used in any marketing material. You can also phrase this as: "PayPal welcome".
As many people use this payment service, you can simply add the PayPal button to your website. You should also have no difficulty requesting PayPal payments as it is used globally.