All too typical park owner who took all the profit out of the park without reinvesting in the business then wants to sell you the potential he was too cheap to invest in. 

Many lenders won't allow you to sell or refinance the properties individually if you have these on a blanket mortgage.

Depending on comfort and cash, it might be a viable option as you can build equity and then sell without having capital gains, assuming it's your primary residence and you've lived there for 2 years.

Fake investors, you can sell the dream, the hustle is sold separately  thats why lottery tickets sell so well.. dream with no effort. 

Question: why would one choose to build an ADU when existing structures sell for less than the cost of development?

Multiple places, then you start reaching commercial territory when you sell and try to move it all as a business.

There’s no reason to go through a disaster (I'm mid recovery myself) and not get the financial upside by becoming the developer and selling a finished product versus raw land.If you have to completely rebuild, it’s a two year process at minimum.

I can also document that I have over 1,000 plus real estate transactions as an agent and an investor.I had two transactions that they just kept lying and telling me and selling me you will have CTC in a week or less, From each of those points it was more than 60 days.I begged loan officer and processor to be truthful.Their failure to close in a timely manner cost me dearly.

The only way to make it happen is to sell some property.It will impact my cash flow.

If you do have to move because of a job, you would be safest (in my opinion, i am not giving legal advice or financial advice), i would sell that property to ensure that you did not just purchase with the goal of moving out early and taking advantage of lower rates and lower down payments for purchasing your home as a primary residence.