One thing I gain from your breakdown is cash on cash , over years can significantly be reduced, if the ratio of rising rents versus expenses and capital improvements are out of control!!

They have an "Alternative RE Investing Strategies" meetup that would be worth attending after Covid-19 is under control.

Often the older ones have paneled walls and they can be harder maintain.Compare the cost and the rent that they will generate and how easy you will be able to rent to the type of renter you want.  

I'm getting ready to move (and will have to move again in 1-2 years due to military orders) and was looking to buy a SFR or duplex to convert to a rental when my tour is up in the area. When looking I found a house th...

Because you cant control how people live, and it will make you crazy to try.  

A single family property probably will have the least headache, and you have a better control than condos.

Summation:  There is no protection for property owners from the appraisal industry where there are clearly people who want to control the price of properties and hold the keys when people are trying to buy or refi properties. 

I’m not big on sharing, so I’d eventually buy them all out and take full control of the property.

Many will cover water, pest control, repairs to the roof and exterior walls, fences, landscaping, maintenance, security, insurance, some cover cable and internet.

Unless you invest via an LLC owned by the IRA, you will not have checkbook control over the funds which means you need to run transactions (e.g. income, expenses, etc.) through the trust company who will need time to process the transactions and generally charge fees for each transaction.