Or you could try the French approach. You tell the trades people that you are having a completion or mid point in construction party on XX date and that they are invited to the party. If you really want to see good work done schedule a party, say a pig roast, or steaks on the grill, anything nice and substantial, and of course they should bring their wife or girlfriend so that they can show off their work at the party. It's like sales, people like to buy form people they like. Good sales people are generally nice people outside their sales employment.
Here is another tactic I used. I was trying to sell our house and the showing reports ere that the kitchen was to small. It really wasn't but because of the way an island was in the middle it looked smaller than it was. I won't go into allt he details here, to shoren up the story i'll make the main point. I hired a carpenter/contractor. He works by himelf and also uses 2 other guys on bigger jobs. When I asked him for a quote i could see him estiating the hours. i had a good feeling about the guy so I told him, i trusted him and he should jsut quote my an hourly rate, that way he did not ahve to put in any fudge factor in case there were unforseen issues. he quoted me $30 an hour. I jsut nodded my head. When we were done with the business end and were having coffee I told him that I didn't want to pay him $30 an hour. he looked rather surprised and disappointed. I said that I thought he was worth more than that and that I wanted to pay him $50 an hour, because i thought he had exactly the right skills and experience for the job. i only had two conditions. he had to start the job within a month and once started on my job he had to work on it full time until it was done. I didn't want him working a half a day on my job then run over and finish up a different job. I got a whole kitchen remodle done in 3 1/2 days, the carpentry work. He did a bit of drywalling, he built 2 cabinets. he didn't do the countertop or the plumbing but he did everything else. We had him over for dinner a few weeks later and he told me he was really shocked and proud when I told him that I thought he was worth more than he suggested. Beleive me I really got my money's worth.
So if you are building ins a small town, and you think the person has the skills and that is the person you want to do the job, offer to pay more than they quote because you think they are worth it, and you will get amazing results. Honestly i did think the carpenter/contractor was worth more than he was asking. He had pride in himself and pride in my job, and I got the whole thing done in 3 1/2 days. The starting date condition and the condition that they not work on any toehr jobs once they walk on your jobsite are important, but if you tell peopel that they are underselling themselves and you want to pay them more, that their skills are worth more, they will not come back and nickle and dime you and your job will be done probably better than agreed to on paper. The key of course is finding those skilled tradespeople who you do feel are craftsmen. Once you find who you want, if you pay them more than they ask, you will get it back in quality of the job, that top up you added to their quotation.
The people who comented about small towns added a lot of value to the topic. We have needed several skiled tradesmen on our farm here in France and all we do is go over to the neighbors and ask. In samll towns people know who the good skilled trades people are. We don't even get bids, and believe me everyone here thinks all Americans are rich nd they can make money of of us, but by working with our neighbors, who make the phone calls for us, we get really great work done at a fair price. I actually couldn't believe how cheap, ahmmm make that low cost, the plumber was who installed a new kitchen sink. The neighbr behind us called a good plumber for us and that is all it took. in small towns people do know who are the good guys and who ae the screw ups. Hopefully you can get some contacts from the cement company and "do over." At least you got some wood out of it, could have been worse.