Hey Alex
I started with porty 30yrs ago, bought a used tm 2.5 yrs later, been using TM ever since with the occasional porty job. One thing I realized in hindsight, there are very few good porty cleaners. And there is a big need for them in high rises and some jobs where security requires doors to be locked, so no TM can access it. You can market to these places and not have much competition. And lots of work in Condos, if your city has lots of highrises, and can charge a good price because its limited access and few good cleaners.
If you get the porty with the new LX motors in them, they have great vacuum. Have a
CRB and good chems, not much you can't clean, even if you had to clean with low moisture.
something to consider