I have rocked parties in the past using single deck CD Players, and a Radio Shack Mixer plugged into an amp, and 2 speakers on stands. No Beat mixing. Simply segueing the music from one song to another. I remember doing a house party where I was told it was the best party people had ever been to, and the music was amazing. I was using maybe $1,500 in equipment, and brought about 120 CDs with me.
The notion that you need to be awesome at scratching, beat mixing, or use vinyl, or have a beautiful looking set up, or have an amazing light show.
Having great, top of the line equipment helps your image, but it's not a measure of how great of a DJ you are.
Being likeable, providing stellar customer service, establishing a strong connection with your audience, and putting together an excellent program via song selection is KEY.
It doesn't matter what you use, or your effect and mixing skills. It doesn't matter if you Sync your music, or beat match. It doesn't even matter how much you charge your clients. (As long as YOU are Happy with the $$$ you earn when you DJ)
If you are regularly/routinely working gigs, and the DJ business provides what you truly want it to provide for you, and your clients are happy with your service...that is what matters.
If you are struggling to earn money, and don't work often in this business, and it's being a DJ is not yielding what you want it to yield for you, then you know you need to improve as a DJ!