The building needs pretty much everything, including foundation repair, new roof, structural repair, new plumbing, heating, electrical, etc.

Asking price is 430k (high-side and been on the market for over 150 days)Monthly expenses are $360-400 (tenants pay cooking gas and electric)Monthly income is $4000.

I would like to hire out each subcontracter by myself ( one company for flooring, one for electrical, one for plumbing, one to do kitchen etc) i guess my first step is to make sure the roof is okay.  

I buy stuff that needs full rehabs at deep discounts, and do full rehabs, New furnace, water heater, electrical panel if needed, flooring, kitchens, roof, windows, ect as needed and force the value up, so I tend to buy between $20-50K so $10-30K rehab and get an ARV between $80-120K with rents at unusually .8-1% of ARV or 2%+of my all in cost, this spring boards you forward, doing BRRR without needing more cash, because you can get all your money back out, I try to keep my equity high and debt low with the prospect of economic changes over the terms of a loan, lots can happen in 15+ years. let me know if i can help, I have 24 locations, 27 doors Im in West Bend and have stuff all over WI. 

The second thing I learned was how to remodel, including demo, working with contractors for the things I couldn't do, like some plumbing and electrical, and general home ownership things such as taxes and basic maintenance.

First of all, the don’t actually do anything preventative such as lubing or cleaning.Back in the day, HVAC tune ups actually consisted of coil cleaning and perhaps electric relay exchanges , etc.

The city required the former landlord on one of my properties to upgrade all the electrical boxes when they installed underground cable.

All I know is I am not spending my US$ on some bitcoin mining machine that sucks down more electricity than you want to know about.

Splitting out the electrical systems alone could run $20k+, since you might have to basically rewire the entire house. 

Also stay away from master electric and gas.