I am pouring a slab under my house(its on pilings). I did my base and forms and have the rebar ready. But here's the question. I need about 4.5 yards of concrete. I was gonna get a truck but how long would it take me with 3 guys to do it with a gas mixer? I've been looking at used gas mixers and found one that's pretty new for $1200.00 Now I'm thinking about using the $$ for the concrete truck and using it to buy the mixer. Any thoughts?