The key to this is maintaining the "corporate veil", which implies that the LLC operates COMPLETELY separate from any other LLC's or individuals.

Matter of fact, ask one of the trainers to actually design a 25 unit location, that people buy, manage and sell for 6 months as part of their training.  

In fact, you are probably better served not to be licensed so that you do not have an implied duty to not use your status as a licensee to take advantage of the seller or the general public by buying their property for less than it's FMV without disclosing what it's FMV really is.

I would not put a letter in the file stating that you intend to live in an on site camper until the tenant moves out, that implies you are not an owner occupant. 

For residential agreements, usually buyer has the option to terminate the agreement, not seller. and there is an implied obligation to act in good faith in all contracts. 

This implies your expenses are higher than the previous owner paid last year.Political climate and the COVID anti eviction rules indicate that politicians are significantly more tenant friendly than LL friendly. 

Does this imply a break down in underwriting standards?

This implies that when the ADU eventually starts to cash flow, it will need to recoup from both the initial negative cash flow and the initial negative position from the addition before you make your first profit.  

This implies that you basically are going to have a heavy weight (the insurance company) in your corner in any suit.One umbrella policy can protect all assets.  

This implies that the return will be significantly via the cash flow.Final item, 6 units implies commercial loan.