I believe the industry average for a salary is about 20-22% of what you can generate in revenue. If in a hospital appointments are scheduled for 30 minutes each (many places do appts in 15 or 20 minutes) and the average transaction is $250.00, then do the math. 8 SCHEDULED hours of seeing appointments per day at 30 minutes at $250 is $1,000,000 of yearly revenue which would be amazing. You'd gross $200,000 yearly but you'd blow up and burn out fairly quickly as there is no time in the 8 hours to answer client questions, write emails interpreting bloodwork and how it applies to a specific case, answer Mrs. so and so's call regard her evil mini-pin and the neurotic worrying cat client that calls every two days and worries about every little side effect about meds her cat is taking which she read in the Merck Veterinary Manual.
So really about $500,000 in total revenue is sustainable and even that is hard work.
And just remember you are supporting 1 -2 technicians/assistants and a receptionist which enable you to do your job
And that building you are working and the utilities
And the 7.65% that the employee pays for Social Security and Medicare (in addition to the 7.65% that you pay as well)
And the thousands paid for workers compensation insurance (which increase as payroll increase)
And the 1000s paid for business liability insurance, not to mentions the owners PLIT (and your is part of your contract)
And to maintain everything inside your lease space (commercial landlords almost never pay to maintain anything but the shell of the building they lease to your employer.
And the support contracts for the computers and software
And the reference lab or blood machines
And, And And.
So yes, everything cost money and sadly clients must pay.
The best answer for a client who things all you care about it their money: "I'd tell you the same things, if everything were free."
How to establish trust with the client is a whole other story....