. $1400 is $900 in lost rent... if you were vacant for a month, while replacing the tenant you lose more than that, plus turnover and in my opinion the most important factor, is it seems like they are great tenants. 

I want to get into REI, because its actually working towards my own dreams and not working in a factory setting ( I build and repair government UAVs...drones) for someone else's dreams.

The appealing factor is key to generate profit I agree.

The most important factor is finding a provider that is transparent, communicative, and is going to be around for the long haul.Below are a few things to do, look for, or look out for, when shopping for a turnkey investment.

its also simple supply and demand.. city went from 1.5 million to about 800k in the last 20 plus years.. so you had vast amounts of vacant homes.. not enough butts to fill them. take that and add flight to the suburbs So you see whole blocks that have been demo'd and or there are some really large factories still standing that look right out of an apocalypse movie.  

A large factor is the fire classification rating.

The other factor is do you have sufficient resources and "toughness" to weather some short term pain - getting rid of problem tenants - then it's a GO!

And Hyundai factory. 

One other factor is the ultimate management of the actual construction.

I have an opportunity to purchase a Industrial building (factory with warehouse) with tenant lease back for 15 years NNN.