If I am $200 short on each unit stats $4800 a year in lost revenue.

Try using AirDna to get more in-depths stats about STRs in your area.

hi everyone,According to bestplaces.net stats , the population in Clevland has decreased by almost 19% between the years 2000-2017 (house depreciation 2008-2018: 30%ׁ)If the trend continues , I'm not going to see any appreciation in the near future.My question is how investors have the courage to invest in Cleveland according to this data? 

After the inspection report came back, the house will need the following work (and this comes directly from the inspector): 1-The two oil-fired boilers must be professionally evaluated and serviced by a licensed HVAC technician to determine the life expectancy and the evaluation of the firebox as well as its efficiency.2-The asbestos in the basement must be professionally encapsulated or removed.3-Need to have a licensed plumber REPLACE the corroding electric water heater for the rear unit.4-All items listed in #8 that are asked to be replaced, should be professionally replaced or given appropriate credit for replacing by new owners.5-Need to have a licensed electrician examine, address and replace all wiring throughout the house and garage.

I recommend that you talk to a Realtor, most MLS have a Stats section, look at how the market is doing, such as DOM, Days of inventory, etc.

Further, the stats on earnings for college grads don't lie. 

Anyone have any insight or stats?

ROI is great, but to me its just a stat or measure of that property, but has little to do with my end goal of early retirement.

Stat.

For the record, I'm not a huge fan of generic stats like this because real estate hyper regional and one big overpriced mansion can skew a TON of data...The median house price increased 4.6 percent from one year ago to $264,800 in August.