I have done many glass block windows which are insulated, come in many designs and colors and let the light in and adds to the value. 

When gutting these older Shotgun doubles you start exposing 100yr old Barge wood with burlap insulation still intact.

Some things you can do to reduce the workload of the units. 1) make sure there is enough insulation in the attic.

There is a bit of aluminum capping involved, caulking and insulating, but other than that, the materials are under $200.

But I will need something more insulated and firm, because I'll also rent each side out to unrelated people. 

Additionally, a previous owner blew insulation in at some point and there are many exposed holes in the wood.I was just wondering if anyone experienced the same title issues and how long they took to resolve.

Because the apartment is poorly insulated, we winterize the apartment, shut off the water, and close it down for the winter months. 

While the property shows well, you would want to have a look at the quality of work - and the things potentially left untouched (perhaps mostly behind the scenes) such as wiring, HVAC, air sealing and insulation, roof, etc.You might also find comps from the local neighbourhood to see where the valuation would/should be if this were a traditional sale.If your plan is to rent, you also want to research the market to know both the market rent and economic vacancy levels and the tenant population(s) to make your business case for the property.

We also insulated the space between the floor joists.

You'll need to call banks and ask them how the financing works as well.Then you have to find the subs to do the work for you and get quotes for:Plans, Clearing, Dirt and Dozer Work, Permits, Temporary Service, Well/Septic|Public Taps Installed, Plumbing (rough-in), Foundation, Framing, Windows doors ext, siding, ext painting, roofing, Plumbing (stub and trim and service connected), A/C, Electrical (int/ext), Insulation, Sheetrock, Cabinetry and Counter Tops, Floors, Int. doors and trim, Int.