Going back to the question, it is basically a foundation and structural upgrade work, each contractor AND engineer will approach it differently, some will use metal instead of wood (my preference), some will dig deeper foundations while some wider.

We were able to create 3/8"th metal shims for the installs after like, the 7th one. lots of trial and error

@Daniel Sanniti between the feasibility study (will give you an idea of what’s renting in your local market), the metal/door supplier (a company like trachte building system) and your vision of what the building should look like (might need an architect for that) you can get a estimate of what your unit mix should look like for best profitability on your investment.

Early March I sent a tech out to see why the a/c wasn't working and draining fast they said it was the evaporator coil that needed to be replaced.

You'll love the style of this house with its front wrap around porch, stained support pillars, black metal awning and so much charm you'll bust!

You can look around and see, every old wall with metal posts is bent over.

They don't have the metal for it.  

After splurging on podcasts, webinars, youtube videos, and across the forums I'm looking forward to putting the pedal to the metal on my investing career. 

I have been told a metal band across the from with angle iron on the building corner tied off to the side parapet walls that step down might be best. 

I have replaced many of the runs--largely the copper is at end of useful life, but also I have some electrolysis where an earlier owner hung the copper with a dis-similar metal and there is heavy corrosion.I also insulated all pipes and ventilate well in summer, cover vents for freeze months.And I had the PEX bid, two... but have not tackled it just yet...