Ikea cabinets, granite, stainless, pulled up the tile, and managed to salvage the hardwoods hiding under 2 additional layers of terrible linoleum.

Huge layer of lint inside, and in the vents.

If you have multiple wythe of brick, you should be able to either affix 2- 4" (in layers of 1", 1.5"  or 2") of foil faced polyisocyanurate rigid insulation (tape all seams and stagger the seams of each layer), or spray the inner surface with 2 - 4" of closed cell spray foam insulation.  

If you are investing outside of your market, it is vital that you are working with trustworthy experts in their field whose interests are aligned with yours.

That is a whole other layer of complexity......I use a local attorney who handles everything for me except the landlord notice.  

The integration of complementary services in my business through layered partnerships such as sales, property management and construction has been critical towards my team's success.

Other unforeseen circumstances could be - agreed to two layers of roofing removed, but turns out there are three.

@Komal Patel this is where knowing you market is vital.

Because there was nearly 100yrs of paint layers on the casings, it took multiple coats and of stripper to even penetrate.

However, I'm quite familiar with the area you are talking about and if you have never been a landlord before, you might want to consider the type of Tenants you may get in the outer layers.