It all depends on your specific circumstances and I think getting other's opinions is helpful but what works for YOU?

Quote from @Emily Gowen: I only recommend investors sell when they can move the money to a better-performing investment or when the sale moves them closer to a specific goal.

Learn what each one of these are, and see which makes the most sense to apply to your specific financial plan. $150 cash flow on any rental especially a triplex is dangerzone imo. 1 month of vacancy of 1 unit could destroy a years worth of financial gains.  

It's worth $149 (prices went up) for a year to see if it will be a good tenant source.

If I have several options, I would prefer a HELOC with no initial draw requirements (i.e. to establish a literal line of credit that I have no specific short term plans to use), i.e. not something like the better.com HELOC. 

How can we prove that any damage is caused by this specific tenant, given multiple residents in the property?

It’s good to budget for unforeseen expenses.Regarding PMI, it’s worth discussing directly with your loan servicer since many lenders require holding the property for a period or reaching specific equity thresholds before removal.If market rents are $2,200–$2,500, hiring a property manager could help you optimize rent while taking the burden of tenant screening off your plate.

It's been so bad here, that I bought an STR in Indiana with another business partner in 2024 because there are minimal opportunities here - unless you have the ability and budget to extensively source off market properties here.  

Quote from @Christian Styles: Potentially able to help you find someone but I would need to know specifically where the property is in order to know who to recommend.  

The key is understanding the nuances of the program and making sure your property aligns with their inspection standards.In Detroit specifically, Section 8 tends to work best in C and C+ neighborhoods.