The amount you can take is highly related to the amount of frustrating BS you can take.
And this BS amount depends on your tolerance but also how tough the patients are that is highly variable and subject to various manipulations. I work 8:30 to 5 PM. I can afford to work more in terms of what I can handle but don't because I highly prize my time with my family, but where things are with my practice with the amount of frustration I can handle more. I wouldn't have said this 2.5 years ago cause my patients were still being more actively managed.
One more thing I forgot to mention. You're going to have to train patients to be good patients. E.g. patients by default think if they miss a meeting there's no problem. NO. You alert them there's a no show fee. Patients think once they're stabilized they can just stop their meds. NO. Patients think that once you give them a med that they like you can just keep on giving it out indefinitely without them seeing you. NO. If their insurance company doesn't pay for a visit (assuming the doctor's office did everything required to get the payment) that the insurance company was supposed to pay they think they don't have to do anything and it's up to the doctor to get their money. NO.
How people handle this will vary. I tend to let people go out of a no show fee if they've been an otherwise good patient without much BS drama. E.g. if they are full of drama but not of their control or making I don't hold it against them. If they missed the appt due to an emergency that they could prove I let them go. If they're a complaining, finger-pointing judgmental person yeah I'll make them pay the no show fee. If they have a pattern of missing meetings I don't let them go.
Here's a example of a true horror story. 19 year old patient with Opioid Dependence gets stabilized by me on Buprenorphine. She misses her 2nd appt and expects me to refill her without a visit. NO. I tell her on the phone that she has responsibilities as a patient that I clearly pointed out to her on her first visit. (BTW I never expect brand new Buprenorphine patients to actually listen to me other than the words needed to get their hands on Buprenorphine. This is true even of respectful nice people. Withdrawal has a way of making you selectively listen). She gets pissy on the phone, starts saying that she's the customer and I need to satisfy her cause the customer is always right and freaks out. Then she goes on a tirade about how healthcare should be free telling me I'm part of the problem (no this is not mania).
That one idiot just cost me as much frustration and stress as seeing 5 patients without any drama.
Seriously sometimes these cluster B rants are more frustrating than a psychotic guy who tried to punch me on the unit and we injected him with Haldol.
To be nice I remind her she's got to follow the treatment rules, I even let her go the no-show fee. I also try to work her in ASAP my skipping my lunch to squeeze her in. I maintain a pleasant demeanor like Gus Fring from Breaking Bad despite that she's ticking me off.
Next visit. She misses the appt AGAIN.
Well guess what? Now I tell my secretary she can't schedule another appt unless she pays the no show fee. She refuses. ----> Well there you go. She's pruned off of my patient list.
Compare that to another patient, she calls about once a month, she is a very nice lady, respectful but she's got treatment resistant Bipolar Disorder where we've literally tried over 8 meds. Her current regimen has her to the best she's ever been but she still has bouts of irritability that require some fine tuning here and there every few weeks to about every 2-3 months. I never mind her calling cause she knows to only call if it's important. She doesn't call for stupid reasons. When I give her directions she follows them. Despite that I work more time on her case my frustration level treating her is very low and that she gives a damn about her mental illness and she follows the recommendations make it that much more pleasant treating her. She didn't know all the rules of the office but over time has been accommodating and respectful in learning them.
Lots of patients are otherwise fine, respectful, nice people but most of them don't know the ins and outs of being a patient.
So I could work, for example 60 hrs a week and have at tolerate very little BS from a good patient population I treat that has been pruned into a group of stabilized, well-treated, happy with their treatment, and knows how the business operates group, and it's fine.
I could also work 30 hours with a bunch of disrespectful, high-maintenance, belligerent individuals and it's draining on me.
Years ago, while at U of Cincinnati, I took over another doctor's Buprenorphine practice who let patients get away with anything they wanted. Within 3 months I terminated more than half those patients. Things like refusing to pay (and she still saw them), refusing a drug screen, demanding Xanax with the Buprenorphine, and this idiot doctor caved in to all of them.
It was a stressful 3 months.