I think due interest rates and lack of full master bedroom we can’t get it off the market .Any advice on what we can try? 

Let's use a tax rate of 25% just for kicks. 

Look for an agent with a proven track record of successfully selling properties in your target market.

A dedicated team shares a common vision, working together to achieve sustainable success and maximize returns over time.👥 Networking & Relationships: Building relationships is crucial in real estate.

But I'd caution you with this practice as you will most likely not receive the holistic and competent advice you should be receiving, which can be critical to a new start-up's success. 

What is their nightly rates and occupancy?

Valid reasons might include increased operating costs, property improvements, or market trends.Fairness and market rates: Rent increases should generally be reasonable and in line with market rates for similar properties in the area.

Just because something can be done doesn't mean that you should do it.I would not own real estate within a retirement account(including SDIRA).Reasons1) Complexities with RMD2) Lose out on depreciation3) Appreciation when sold would be taxed at marginal rates instead of preferred long-term capital gain rates4) Etc

It's been successful so far. 

My question is, would adding a shed to these properties increase rental rates?