They should be proactively communicating with you as to why they can't find a tenant and discussing options with you.PM's do get busy, so before firing them, try to have an open conversation to find out why it took so long and what can be done to rent faster in the future.

However, I’m increasingly excited about starting a unique stays/glamping business.

Sometimes, mixing family and business can be difficult, but I am happy you all are thriving.

Quote from @Brady Ascheman: Let's talk about this directly as a business decision.

This is not personal, but if a person cannot save money now real estate is the worst investment to get into as it is one of the most cost intensive businesses to be in.  

@Jeremy H.there is no need to self manage for the passive investor looking for a fixed NNN return in the 15%+ range.Smart business owners and retirees looking to diversify their investment portfolio are not looking to run a hospitality business. 

Thats how you run your business , not me 

There are a couple of things that come to mind, if a payment is missed the lender cares, if the servicer goes out of business or misses a substitution of trustee, the lender cares, if the borrower goes to the lender to try to get removed from the loan (usually to buy another house) the lender cares, if the property gets caught up in a bankruptcy or divorce, the court cares and that means the lender gets involved.

I will eventually look to distance myself from this part of the business and hire a PM.

Like Jake Baker suggested, keep good records and have a dedicated bank account for your property, properly separating personal and business expenses.