There are many excellent, professional and responsible tradesmen in Bangkok, who take pride in their work and and charge reasonable rates. I have used the same people for different work for more than 10 years - 2 for AC, 1 for plumbing and 1 for electrical works. 1 was a friend of my wife's and 3 'suggested' by the management of where we live. Occasionally of someone is for example installing a washing machine and we need some urgent work we may ask if the person doing the installation can do some work when convenient and response is positive.
In my experience good skilled tradesmen are in demand and not so interested in doing small jobs unless you know the person. Home Pro option may be good for people who don't have easy access to tradesmen.