Kevin Schulte the POH are worth about $1000 each in scrap metal :) Any homes that I buy to replace them will obviously have some minimal resale value, but I don't know that I would give them away to tenants to charge $200 lot vs $600 for the POH.

I did check metals recently so...maybe they were kind enough to show up on your site. 

(condensing unit sits on side of house and heater and coil sits in attic or in a closet inside house)

On the other hand, if it is a former employer plan, you can open a self-directed solo 401k if you are self-employed, or a self-directed IRA and then transfer the 401k to one of these vehicles which can then be invested in real estate.Following are the similarities and differences between the solo 401k and the self-directed IRA.The Self-Directed IRA and Solo 401k Similarities Both were created by congress for individuals to save for retirement;Both may be invested in alternative investments such as real estate, precious metals tax liens, promissory notes, private company shares, and stocks and mutual funds, to name a few;Both allow for Roth contributions;Both are subject to prohibited transaction rules;Both are subject to federal taxes at time of distribution;Both allow for checkbook control for placing alternative investments;Both may be invested in annuities;Both are protected from creditors;Both allow for nondeductible contributions;Both are prohibited from investing in assets listed under I.R.C. 408(m); andNeither may be invested in your own business.  

Should I install metal siding or vinyl?

The building is older, it was constructed in 1960, but it has a newer metal roof.

., one in the attic of their apartment and the other in a metal storage shed on the back of the property.

On my first multi property investment, 6 units in a c class neighborhood, 2 are vacant, one I had evicted before closing as part of the deal, he was 4 months behind, the other moved out, the units all need to updated and renovated, they have good bones but neglected for many years, they are two brick buildings, both with a new metal roofs.  

I just got an inspection done on a property where the inspector believes there are major foundation issues (cracks, bowing interior, ineffective DIY metal posts in basement).

While appliances are probably not a make or break for anyone, it does seem to work as an initial wow factor to pull people in (like if people are looking at pictures of 10 different apartments and you're the only one with stainless, it's going to make you look higher end than the others and a higher likelihood of getting a call above the others).Flat top stoves also are a nice upgrade over the normal coils.