@Bryce Carafa
You may have some of these steps done but this is how I approach it.
1. Clean out
2. Demo
3. Major systems- roof, electrical, plumbing (you should already know based on your due diligence if these things need upgrading or not
4. HVAC and Water Heater
5. removing walls and adding headers to open up spaces including ceilings
6. windows
7. outside upgrades painting/ siding
8. drywall
9. painting
10. flooring
11. bathroom and finishes
12. kitchen and finishes
13. Clean up the outside and make yard presentable to your liking
Bonus* double check the things you deemed good during your initial planning.
This happened to me one time. I knew that the water heater was functional during my initial planning. Went through the whole process and was a day away from renters coming in.
I went to start the water heater back up and it failed. Had to run out and panic buy a water heater. If I would have checked the system earlier I could have mitigated the panic/rushed situation.
As far as need to do: In my area of Los Angeles, people are looking for open space between kitchen and living room with a nice Island in between to be conducive to entertaining, so that is something I am always considering when making a place rent ready and marketable at top dollar.
Look at your area and make your rental competitive with the others.
Good luck!