Think that adding overhead heaters in the area of hot tub will solve the problem in colder months.

 (3 convention units +  3 ADUs) * 3 lots = 18 unitsIn general adding one ADU is not a good investment because there is no more expensive residential development than a single, small unit.  

You can cold call, door knock, do social media ads, mailers, network, etc.

There is also an ad on small "house" which is also being rented.

Adding the ex to the title could trigger gift tax implications, so keeping it simple is best.

@Blaise Bevilacqua - I agree with the added expense items that others have called out including vacancy, repairs/maintenance, capex, unit turns, and low insurance.

They are on a big push to get back in the game though, have you seen their recent ads stressing that they only list private homes?

BUTTTT there is sooooo mcuh garbage out there that you'll have to sift through to find the gold and then you have to learn it, put it in proper order, THENNNN take action. 

I am good at Tik Tok ads and Facebook ads, this works for buyers but not sure what works best for listings.

I have heard that it's a good idea to form an LLC as an added layer of liability protection.