I am also beginning to build my team out of state, and understand that some of it will just have to be trial and error, along with BP referrals.Thank you guys for contributing - next time I'll be more specific with my question, or come to ask the the question after a little more self-education.

I'm a practicing trial lawyer and finding proof of negligence is not a hard thing to do and your insurance policy is full of exceptions to coverage.

It's (variations of):-"On average, ROUGHLY 50% of your rental income will be spent on expenses".Yes, properties that generate 2%+/m gross rental return are more likely to average HIGHER than 50% expenses (because risk / cap ex will be a higher PROPORTION of low purchase price).Conversely, properties that generate less than 1.25%/m gross rental return are more likely to average LESS than 50% expenses (ie. higher initial purchase price, but same cap ex $).

This will give you more consistent income, less risk, and you can learn from experts instead of learning by trial and error.

He resolved it and now has 100% filled by dropping the rent from $500 to $450 and doing some marketing - he learned this through trial and error after trying several things which he said gave much insight and was very educational.

@Kendrick Salazar It was trial and error unfortunately.

A large variation I found between my math and yours is the calculation of gross rents, and NOI.

I strongly believe automation in manufacturing is going to be catastrophic sooner rather than later and I need some variation in my portfolio. 

Also dont ever give up. its through trial and error that you will succeed.

But as mentioned, to get the system set up I spend a whole lot of time and trial and error.