If so where is the next beach vacation/investment place at?

One day your STR may be a used by a family for a vacation, the next day by a guys gold trip. 

I always explain ARMs like so: If you plan a vacation out of state for 5 days, do you book your hotel for 5 days or do you book your hotel for 30 days? 

@Jordan Hanks - Some companies including Evolve Vacation Rentals charge 10% for booking and marketing, with extra fees for cleaning, re-stocking, etc.

If you can swing it, I would tell her that you are going to have to adjust the rents to the market level, and give her as much time as you are reasonably able, maybe 3 to 6 months to vacate, provided she's paying.

I had one where we could wait and they went on vacation while we did it.

At the time I bought it, I lived just a few miles away and I didn't want to play any games with trying to call it a "vacation home" in hopes of a lower rate. 

So, I'm going to speculate that, if you want to use the condo 3-4 times a year, it's probably for short vacations, whereby the property will be more investment than lifestyle for you.

Just for the accidental times when they have the bathroom heat off because its hot out and they go on vacation for 3 weeks with the door closed and the temp here drops under freezing.

And when we moved from our 3br condo to a SFH in Colorado Springs, we turned the 3br condo into an MTR as well.In between, we also partnered to buy a duplex in Colorado Springs and just recently a vacation rental/STR in Mexico, but this was years after that first one.