I'm planning on doing a str loophole so low priced str won't work well for me 

You end up having to sell to someone with higher down payments, better credit, better operating plan, and 100% investors who never want to pay top prices.  

I calculated her monthly payment is 1300.Since it is a vacant investment property where she will be taking a loss at sale and has been on market for 60 days, I am thinking seller financing may be mutually beneficial.I am planning to make 2 offers:300k with conventional mortgage.

Additionally, strong tax planning is essential, as your W2 income limits your ability to deduct passive losses.

You need to work with a property manager that has experience with this, unless you plan on doing it yourself.

What’s your game plan for managing the park — hands-on or hiring a property manager?  

. - Post closing Plan.

Almost every realtor has several investors ready to invest at least $2 million in cash.If you’re planning to use hard money loans, agents won’t show properties without prior proof of funds.I’m curious, is this a general market trend in Ohio or just this particular realtor’s approach?

We'd love to escape the cold Dutch winters and enjoy a warmer climate.When we're not using the property, we plan to rent it out as an Airbnb to generate passive income.

The best thing you can do is plan that the first year will be on the lean side.