By "partial" I mean renovating the kitchen and bathroom, painting the place, re-tiling the floor and maybe adding some smaller features that can make a difference to prospective buyers, such as new A/C units, new internal doors, or maybe even sell the place furnished (home staging is not really an option here); with no or minimal demolition, and hopefully without electricity or plumbing issues.

But you are telling us al it needs ALL new drywall, and plumbing why ?

We are a Christian based plumbing company with over twenty years of experience in the industry. Whether it’s new construction, additions, remodels, service and repair, sewers and water, or commercial projects we have ...

@Nathan Gesner 1) if you’re investing with a spouse make sure both are on board for self management or it will harm the relationship. 2) it’s a business, not a charity, so if you’re susceptible to hard luck stories from applicants/tenants, don’t self manage. 3) water heaters, heat and a/c, plumbing only seems to break down when you’re finally on vacation, so have good contractors in place who will go on your call and let you pay them from out of town.

I can see having to be licensed to do electrical, plumbing, hvac, structure related work.  

The answer to this will eliminate plumbing issues like leaking water mains or sprinkler lines.  

Even if you fix the crack, if the window well is still filling with water, it's going to cause problems.So, you need to troubleshoot why the window well is filling with water, and fix that issue, in addition to the crack.The water in the window well is either rain falling in from above, or it's ground water rising up from below, or it's a leaking water main/sprinkler line or other plumbing...or, it could be all three of those things, or any combination.Good luck!

The building itself contains a bathroom with fully functioning plumbing, electrical, and an HVAC system in place already. 

I have received a quote from Hope Plumbing, Pristine, and Exceptional Drain Cleaning. 

At some point you need a new roof, plumbing, windows, HVAC, etc - setting aside 5% of rent may cover a new water heater, but very few components of a house last more than 50 years.It's 2024: books written in 2015 or 2018 are based on the market conditions in year 5 years before they were written.