There is also a stair case crack on the brick exterior(no interior cracking).

Youll want to examine the foundation on the exterior near there, as well as interior to determine if there is an issue. 2) Insulation in a crawl space would just get moldy.

They are almost 1000sf/unit, interior entry doors with locked building, 400sf basement storage each unit, and laundry in basement.

I had to repair the driveway, new fence, do the roof suffice, new kitchen cabinets for one of the units, fix the front and rear decks/porches, installed security cameras, eviction cost of 3k, dumpster cost, paints, interior door

Exterior of the house is fine but I saw the interior of the property and it probably needs torn down to the studs.

For one, they don't make'em like this anymore; these all-brick exteriors are like little tanks, it's tough to ding them up much, but the level of deferred maintenance on roofs, porches, windows, systems, and the actual interiors can be rather extensive and often difficult to assess up front.

I once toured a home with investors that had lovely interior pics and had been expanded but at the expense of no back yard.

They're aluminum clad on exterior and wood interior.

I'm working with a big container manufactures in Vietnam and they have been customizing and building container home for awhile now with sub 10k price tag normally (pricing depends on the size, interior design and other requirements, of course)Currently i'm living in Seattle and have been looking around for any partnership opportunities to start out our container home projects in the US. 

Phase 1: Demo/Interior Framing layout walls and rooms. [10 days] Demo whole house/clean up interiorExpand walkway between living room to eating are by 3 feet (install new header)Frame up new laundry area, frame bedroom wallFrame up new patio sliding rough opening and install new sliding patio doorFix water damage floor in hallwayTile bathroom floor and wallsInstall rough electrical throughout house.Install rough plumbing throughout house.Install insulation and drywall sheetrockMeasure windows/door.