Anyone lay their own concrete?

I did find a company a guy ive known with forever that said he would do $5500 if i pay now and I don't touch a thing but said it.wont be poured this year. I trust him but he's not the owner so that seems to sketchy for me.
I hope you are kidding. As he said, "won't be poured this year" or next year or in ten years. Would not pay anything unless it is for material on site and balance (labor) upon completion. A company or not, business is business.