To meet this requirement, you must spend at least 750 hours per year actively participating in real estate activities, such as property management, development, or acquisitions, and these activities must constitute more than half of your total working hours for the year.

My goal is to have financial freedom so I can eventually quit my 9-5 job and use my time to spend with family and do things that excite me.

Personally, I'd spend a little more if I knew there was significant value add there.

Only spend 2 hours on it.  

Is spending thousands on a sprinkler system worth it or do I have other options?

You can EASILY pass several million to your heirs tax free and avoid at least a $1M in taxes if you spend anywhere near 20 years investing in real estate. 

you are going up against people and companies that spend thousands or even tens of thousands of dollars a month in marketing. 

The last polling I saw showed that the large spending by the aids health foundation was working.  

I think with the time you’ll spend working on this, you could find 2-3 existing parks to buy in the meantime and not need to take anywhere near the same risk 

I'm sure they also spend significantly more time on their role, than you do in yours....or at least their time spent is more constrained where yours can be remote/on the road.