Here are additional options:Rankbreezehttps://rankbreeze.com/This company does more than just optimize pricing.

When you put your focus on what you bring to your buyers, and maintaining real relationships with them vs them just being "on the list." 

Whether you can use Cost Seg to accelerate depreciation and offset your personal taxes is dependent on your income level and whether you qualify as a real estate professional + materially participate (I.E. pick tenants, repair issues, maintain property) in the properties you're invested in.

I would maintain a good liability policy and if a good opportunity comes along pull money out of the investment to fund the next deal!

Have you done a blended deal, where you maintain your original mortgage and take a HELOC instead of remortgaging the entire thing? 

My money will go farther in places like Charleston but also be harder to maintain tenants or flips may stay on the market longer.

The more you maintain your vacation house, they better you will do.

My uncle personally has a few cash flowing rentals that at the time of purchase he got at a good price before major market changes, and even through the overall loss of value in his doors they still maintain a higher growth potential just with the cities intense influx of people, organizations, sports teams ETC...Hope that's in some way helpful!

Monitor your ads every 2-3 days and ensure your budget is optimized.

You probably want to keep it clear to avoid excess weight and access to maintain the hot tub.