I am also including the taxes and insurance while running the numbers.

However, the specific details can depend on various factors, including the type of asset, how long it was held, and any applicable tax exemptions.

All our rental units, including our small units, have tanked water heaters.  

It's a split level that I bought in original condition, including a 1984 ancient-looking air conditioner and all the things that come with a house of this nature.The plan was to do a full cosmetic + replace HVAC and Roof + prune back 60ft tall pine trees AND turn it into a house hack bnb.What I've learned so far....- Trust but VERIFY everything on the buy side.

Some of those include Liability. 

As far as negotiating furniture, I would include “furnishings negotiable” or “comes furnished” in a contract.

that we’ve learned in our 24 years, managing almost 700 doors across the Metro Detroit area, including almost 100 S8 leases.

What could I expect to cash flow per year including on and off season?

People want flexibility, mobility, convenience, and automation...including residents, not just travelers. 

To include, stealing from businesses, sell drugs, etc... but what my area and CA is hard on is environmental violations.