Similar but a little more complicated than running traditional buy & hold rental analysis.  

Most of them are not complicated issues, but the three draw my attention are:Sewer pipe rusted -- Hmm . . . sounds to me like a cast iron pipe, and rust happens, but it is also the cause for failure for these lines and replacing the sewer lines is usually not inexpensive.Sump pump repair - easy enough to find out the cost of this, but it's variable so I'd want to nail this down.Dryer venting - there is usually an easy way to run new venting, and "the right way." 

There is another complicated way to technically do it right, but we have to practical.

Partnership tax returns have gotten significantly more complicated over the past 5 years. 

The building is condemned and the land is worth maybe $5K.I know this a lot of information and kind of a vague question, but I am in a very unusual spot and Covid has complicated an already difficult situation.

The 1031 Exchange process is complicated. 

Most are tied to a brokerage and focus on doing higher volume of easy transactions and aren't interested in complicated "out of the norm" sales.E-Title out of Detriot, Legacy out of Clarkston or Lighthouse out of Hastings can help you. 

We tend to over complicate things 

I am not totally against LLCs, I just think you don't need them when you are just getting started because it just complicates the transaction and I am a fan of keeping things simple.

Sounds like it too complicated so not a large figure and a two family property.