Not that you are asking for advice or even need it, I think the most important aspect of running a business is to treat your customers or clients well. I don't mean to do stuff for free or at low profit margins but make them feel that their money was well spent with you. My best marketing was done by my clients. If I treated them well then they would be very loyal to me and recommend other to use me. I still work for many people who initially came to me in the 1990s. Doing this for a number of years builds up a very strong and reliable client/customer base and will almost always result in a very successful business, IMO. Basically, you out hustle your competition.
There is a local vehicle repair shop near me that is owned and operated by a Korean mechanic and he has hired his family members to work in his shop. They are all hard working people and I use them for repairs that need a lift or special tools and/or skills and knowledge. Or things I just don't have the time to do myself. There have been many times I have asked him to look at, or repair, something and he has told me it isn't necessary. He could have done the repair and I would have never known it was unnecessary. I trust him completely to work on my vehicles. He has never disappointed me. I have probably sent two dozen people to him as a result of his excellent service. To my knowledge, all these people were very pleased with his service and now recommend him to people they know. Also, his shop isn't super clean and organized or has top notch equipment. It is highly functional though and efficient. Sometimes it is hard for me to believe he has completed the repairs I needed done in such a short time frame. Especially considering the high work load he has on a daily basis. I think this is possible because he and his workers don't waste a lot of time making sure the shop is pristine and very organized. Maybe it is the Korean work ethic that makes them so efficient. I have never seen a non Korean employee there.