Newbie- on the fence

Hello, I am considering opening an estate sale company in Southeastern Michigan and have a couple of questions for those more experienced.

There are some great threads in this group that have already given me a lot of tips and considerations as I consider my options.

what those posts haven't addressed:

1.) What would you estimate is the actual time commitment (on average, of course, it would vary by volume of items/size of the house, etc.)?

2.) If your customer is concerned about the house (floors, carpet/rugs, especially, etc.) do you offer to put protection down? Would this be a separate fee or would you prefer to market/offer an additional post-sale clean out?

3.) For those who do offer a post-sale clean out, what does that actually mean, and what would be a fair price for that service? Looking for clarification on whether you just remove all remaining items, do a light cleaning (i.e. clean up floors/surfaces after the sale), or whether this would be considered a deep clean so it is fully sale-ready- all surfaces get touched, including walls/floor, bathroom surfaces, etc.?

4.) If you are running the sale and offering full, detailed cleaning, what would you anticipate your time commitment would be for both? I understand this could also vary greatly depending on factors I mentioned above and level of soiling in the house. I'm really wondering how many sales may be feasible per month on average if offering both services.

5.) What are average additional/"hidden" costs- insurance, marketing, square/card service, payroll, disposal of unsold items, etc.? What am I missing from this list?

6.) Finally, how much, on average, do you generally make per year? I realize this can also vary widely but looking for a ballpark, especially as a beginner and once you have more experience.

About me- I am a very detail oriented person who loves to organize and learn about the history and modern value of vintage items and furniture. I love attending estate sales, even woke up at 8am on weekends in college to go to the sales before thrifting became as popular as it is today. I am an introverted extrovert who cares about people and understands this is likely a very hard time for many in need of an estate sale service. With that said, I have strong boundaries and understand heightened emotions and nostalgia can pose risks to a sale, and I feel confident that I could satisfy both offering compassion for my customer without sacrificing what's best for business. I also understand the value of return customers attending the sales, and, as someone who loves attending sales myself and looking for deals, I believe I could price fairly for those attending the sales so they have incentive to attend the next one.

If you made it this far, thank you for any advice you can offer!