I would think that 180k is on the low end of private practice owners/partners. I’ve never heard of a well established pod owner/partner making less than 250k/year. I have to think they are a PP associate.
That is lower end, but it happens a fair bit.
There are a lot of factors...
If you don't have good payers.
If you have large loan payments for the office's buyout or equipment (usually on top of student loans... interest compounds).
If the area has high overhead in general (labor, rent, etc), that slims margins.
If you have a lot of nearby competition (schedule isn't full and/or marketing to keep it full is costly).
If you try to work part time or need multiple locations to keep the days full (overhead is still full time when you're not there).
Some podiatrists are just not very smart, likeable, well-trained, or biz-savvy.
Some offices make bad moves in hiring staff, accountant/attorney, billing service, IT, associate docs, wasted equipment, etc.
Having a successful PP is hard even if you have all of those personality tools, connections for the biz aspect, training to offer all F&A services. If you are missing key stuff or in a city that is very saturated and/or bad payers, then it's dog eat dog.
...I will also say the DPM discussed by his wife in the Ramsey vid is an employed DPM. It is not hard to look him up, but it's a sad story and should not be public info, even if it's a common theme for podiatrists and our debt and job outlook.
Overall, I know barely any solo/partner/owner DPMs beyond the startup year or two who are making under 200k personally, but it happens. Even most solo docs who are part-time or semi-retired are over $200k net once established. Some of them have a lot of family money and just do their pod office as more of a hobby than to max it out. If owners didn't typically make substantially more than employed colleagues (even without hiring associates), then there would be no reason to do the entrepreneur aspect and initial risk and hustle of it (aside from job security and autonomy... still pretty good reasoning).
Aside from floundering, the same goes for occasional solo offices or even pod groups struggling to the point of failing. Heck, even hospitals fail or falter and are forced into closure or acquisition. Labor is expensive, and employee loyalty is pretty low due to inflation and other factors. People will go where they are treated best, they change jobs frequently, many will jump ship for a couple bucks more per hour or better benefits or better schedule, and that even includes going to home on the couch or to a classroom - if they can get govt checks to do that instead of work.
Mainly, specific to podiatry, the demands for money back on the fake wound grafts are going to sink - or severely change - more than a few podiatry offices also. It will be worse than the many pod docs/offices who were coding pre-fab braces as custom braces around the time I was in residency about a dozen years ago. The audits are going out almost daily on the grafts now. The DPMs who were seeing ten patients per day with half of them wound graft applications and counting on those rebates are not sleeping very well right now.