So we're coming up on the fundamentals of real estate. To get more cash flow, it's more work. For something that is truly passive, the cash flow is less. That's just the way real estate works.
Second, no one will do work for free. You're frustrated by the amount of time it's taking from you. Well, the work itself doesn't get easier or less time consuming if someone else is doing it. If you don't want to hire a PM to do this work for you, then you could try a couple different things when you move out:
1. Change strategies and turn it into a LTR. The LTR will be the easy button (compared to other strategies in real estate) but will be less cash flow. Perhaps it's worth it for the increased appreciation you anticipate. If you sell after a couple years, you've gained appreciation and still get to keep the profits tax free if you've lived there 2 out of the last 5 years.
2. Change strategies and turn it into a MTR/STR. This should, ideally, get more cash flow, and allow you to hire a PM without breaking the bank. That takes the every day burden off you, and gets you cash flow. Make sure that's allowable with the governing agencies/laws.
3. If none of the above work, would it be so bad to sell the house? Take the appreciation and turn that into another property that is better for one of the above strategies, allowing you more of a passive income than you have now. It has served you well, taught you a lot, and now maybe it's time for you to turn that into a better investment for where you are in your life.