Also, I recommend finding a good real estate investment calculator (just search in the app store). 

Talk to an SIOR broker about rent rates, competition and amenities offered from other landlords, etc. and expected best case and worst case for cost and time to get stabilized.Once you evaluate current business owners in the building analyze them to see if they really need a location there or can they easily move to cheaper warehouse space or move into a home office if they had to.

The local grocery store used to be nice and clean, not they have armed security and shoplifters nearly every time I go, with vagrants hanging outside the front doors. 

Although there are furniture rental companies out there, I would consider using your own or buying a decent second hand from a thrift store.

Observe nearby convenience and liquor stores carefully.

The BRRR book by David Greene https://www.biggerpockets.com/store/brrrr-ultimate.

I am renovating a kitchen and a friend of mine recommended a Store locally that sells RTA cabinets.

The best way to go is to call local building departments, Tax Assessors, county clerks, experienced and successful real estate Agents/brokers, lumber supplying stores, local real estate associations, City councilors, or City Building Departments, Local popular newspapers, and popular cellphone companies. 

Have anyone ever used day laborers from a store like Lowe's or Home Depot?

My reputation is on the line and I won't install shingles that someone bought at a discount because they were sitting out behind a warehouse for 5 years.