I'm going to list off some of the lowest hanging fruit from that perspective below:Attic/ceiling space often can be helped immensely by blowing in additional cellulose insulationWindows and all wall terminations should be examined and caulked/filled with expanding foam insulationWalls can often be supplemented with additional insulationRim joists, basement walls Look into selectively upgrading your main appliances (water heater, air conditioning, furnace) with high efficiency unitsOld fridges use a lot of electricity - you might take a look at what you have there and consider upgradingSome utilities have programs to offer rebates/incentives for upgrading much of the above so I'd look into that if I were you!

Cracks in the foundation, dangling wires, three layers of roofing material on the roof, broken fixtures, off color carpet areas, spots on the ceilings, soft spots in the walls in the bathroom where water has penetrated, swampy areas in the lawn.

You will need soils reports, shared wall fireproofing if neighboring properties are autoshops as well.

I had studied real estate investing for 2 years prior to this and hit the wall - no money, no credit, no confidence. 

Paint the fascia, install shutters, install a black porch light over the garage door, build a small retaining wall to left of the front porch for landscaping, paint the vent over the front porch, replace the wood balusters on the porch to black aluminum....anything to give it some contrast and break up the white.

Is it best to paint the bathroom and kitchen walls a different color from the other walls?

Some say get section 8, others say stay away from section 8 they will destroy the house, thats their mentality...I think landlording is kind of a crap shoot sometimes...Ive had a tenant who was making 100K (verified) and had a  great credit,  but he had patched up holes in the walls  which I noticed after he moved out....Then I had low income people who had the house so clean, I would never be able to get it that clean myself...Go figure! 

Possibly a little foundation work (it’s on blocks)new water heaterneeds central ac/heat installednew roof (fascia and all components included) new flooring possibly some subfloor replacement exterior siding work(paint some, replace some)some drywall work where there are some small and large holes in the ceiling and walls in a couple of spots. couple windows replaced because of broken glassall new doors (2 exterior 3 interior) new cabinets and counters in kitchennew bathroom sink+vanityThis is in South Mississippi and would be using cheaper materials because it’s in a lower class neighborhood. 

Do you guys look at the condition of roof, walls, bath tub, etc?

Bathroom lacks any storage)- Open up kitchen to living room via wall removal, creating breakfast island w/ more storage (unit is approx 650sq.ft. and kitchen has very little natural light)