What you want to ask is "Why do different masters charge different fees depending on the auspicious day?" right? The difference in fees is mainly due to the different levels of experience of the masters.
Ask the master to help you choose a good day. The price is different, mainly because the master’s experience level is different. It's like going to a hospital to register. The prices for ordinary doctors and director-level doctors are different. If you want to choose the right day, then of course it would be better to choose something more expensive.
Ask the master to help choose a good day, the price is generally between 300 and 600. There is a lot of knowledge and emphasis on choosing an auspicious day, and it is not advisable to choose it arbitrarily. It is relatively easy to spend hundreds of dollars to ask a master to pick an auspicious day based on Feng Shui.
There is no authoritative data and is for reference only.