When I do a job in the house myself - people often say "why don't you pay a professional". The answer is that too many "professionals" are going to do the job as fast as they can with the handiest/cheapest (for them) materials - and with no thought to what might happen in the future. Next time round it costs more to undo their bodges.
If you find someone you can trust to do the job properly - then they are worth their salt. The problem can be that they become popular and are tempted to outsource their excess jobs to the very people you are trying to avoid.