You mention you have no experience in these types of parks and your first deal you want to take down 100.When I was working for a GC we did a condo project for a developer who never developed a building before and he sold his company (it company) and used the entire amount to develop real estate.He ended going bankrupt because his inexperience with his experience and his designers and every mistake they made was multiplied by 150 since that is how many units there were.

They still mention settling the estate, checking in to see how things are going, I'm still interested in buying your property etc.

Provide direct booking site and mention the resulting savings.  

For example, I mention that every adult must pay a $30 application fee, pass my credit/criminal background, make a combined income of 3x the rent, and whether or not the property accepts pets.

If you aren't in a hurry, you can afford to wait a little bit longer.A few other responses mentioned that your closing costs are a little high. 

Like Charles mentioned, there are plenty of things (pros/cons) that go into investing in real estate.

Relating to renting, when renters compliment a unit they almost always mention the kitchen.

Apologies if someone already mentioned it.

You could potentially "House Hack" the ADU you mentioned, instead of renting.

Also, listen to podcasts and when a guest mentions a book that inspired them, go buy it (I buy on Audible so I can listen while I walk my dog or drive).