David, I went through something similar last year. In my case I bought 2 4 plexes right next to each other. I only wanted one but the owner only wanted to sell to somebody who would buy both. Anyway ended spending everything to buy the properties and the renovation budget went nearly to zero. I have never done serious construction work but that was my position moving forward. I also have a full time job that requires me to travel extensively.
The thing that saved me was stepping back and looking at this project as s business and as a second time job. Cash flow was critical to fund the repairs. I kept all the tenants at below rents to keep flowing. I ranked each unit from to best to worst and interviewed the tenants extensively. I decided which tenants were the keepers and which were less desirable. I decided to tackle the worst unit first and leave the best for last. As each was rehabbed I moved tenants that I liked into the fixed units. I increased their rent but they got better units.
My renovation plan put me on site every evening of the week and all day on weekend. I did everything from drywall repair, to tile, to kitchen cabinets to sanding staining floors. I never did any of this type of work before, but YouTube is a life saver. First unit took 7 weeks, but the last one only took 2. The unit needed less work, but I am also much better at I what do.
If I had a contractor my first unit could have done faster. I don't believe anybody could beat me on 6,7 or the 8th. I saved a TON of money doing everything and I learned even more. I don't plan on being the guy swinging the hammer forever, but I am much better equipped to negotiate contractors and to estimate renovation budgets and time lines.
The point of this long story is it can be done. But you have to set goals with hard completion dates, just like a project at work. You also have to set your hours to work each day, just like any other job.
There is a light at he end of the tunnel and hopefully a pot of gold.
Good luck!
Arlen