For instance, if the employers in the city are highly concentrated to one industry you have large risk when that industry goes under you will have no tenants and your house value will tank. 

My guess is you would have the same issue.One option is to put the furniture in storage and long term rent it.

On move in day should I have the oil tank full and require they fill it at move out or should I leave it as empty as possible?

Examples of asset types: residential homes,  residential development, industrial, commercial development, mobile homes, self storage, land, multifamily, notes, flipping, financial services, and etc.

finally a Bedroom should have an egress directly to the outside, whether a door or a window that opens with the opening being a minimum of 5 square feet (ground floor) with minimum opening dimensions of 20" and 30" (to allow a firefighter with air tanks to crawl through it). 

Warehouses- Storage Units, Bulk warehouse, heavy machinery, etc. 

I listened to a few BP podcasts yesterday on self-storage, launromats, RV parks, etc. but was hoping to get a bit more granular on specific steps one should take in order to:explore the market (resources for this - where to look, etc.)find prospective properties (on-market and off-market)valuation methods to gauge the potential profitabilityunderstand the expectation of costs - aside from buying the property, what other things should I be thinking about?

Anyway to generate extra income through the shed/storage spaces?

When it comes to tenants, they may end their previous lease with expectations and if you can't make it, they are screwed and I don't know the legal ramifications of having to pay for a hotel, storage, etc. 

Purchase price: $147,000 Cash invested: $67,000 Two Family with three Garages/Storage units.