My “tenant” refused to allow the house to be shown and demanded I pay $3000 for him to move out by 02/02/2020.

Are they in high demand?

I guess they were not going to tell me that they now had a service animal at the house. 

My advice is to know your market - KNOW THE LOCAL REGULATIONS, know what kind of demand there is, a realistic sense of occupancy and revenue, and a realistic sense of your expenses.  

You want them trending down this indicates high demand in your market.

They can be hard on the property, and very demanding.

I haven't had a chance to reach out to the county or a property management firm but in your experience, where would you check the demand for section 8 housing?

If anything prices for outside work are a bit more expensive in poor working conditions .agree with all points,  guess it's a demand supply market thing... 

If they are jointly and severally liable (they should be, and I agree with others that moving forward you have ONE lease with everyone's name on it), then issue them rent demand notice, including late fees, addressed to "Tenant A, B, C, D and all other occupants."

You can avoid massive headaches and costly mistakes through some of the advice and experience on here, there’s plenty of pitfalls we made that you can avoid by reading and asking questions.Cleveland is one of the best turnkey market and the most popular for investors because of high rental demand and low cost of entry, property prices are pretty inexpensive here.