Apollo, the big RE empire, sells annuities via its fast-growing Athene insurance entity.  

We will need to verify the rents can support the mortgage payment, via a market rent 1007 (if the property is vacant) or a lease agreement (if tenant occupied).

Similar green energy investments could be considered if you can make the numbers work (credits on some types of low income housing can be north of 50%).Depending on how long these properties have been held, they could consider implementing cost segregation studies via a change in accounting method to accelerate some depreciation.The operating proceeds could be re-deployed into new properties where cost segregation is an option to accelerate depreciation to offset proceeds.If the properties are low basis and we are not maximizing the 199A deduction, maybe considering an S-Corp structure for management to be able to participate in retirement plans and also generate wages to use as a 199A base. 

I've been studying videos and personally gone through these nightmare pop-up expenses via my rental properties so it's been actually helpful in my journey trying to find my own home to live in.

For example, we were approved last week via section 8 for two of our 3bed 1bath MF units for over $1250 a unit.

If you go through the exercise to determine a property value via NOI/cap rate adjusted for the mandated owner occupancy for what value is added by the ADUs it would be nice if you could post the results.   

I'm not a broker and am not paid on this - it's just a connection/referral.Following up via DM momentarily.

Kindness with boundaries. 

Do you intend to rent the property out via short-term or long-term rentals?

I have made at least 7 digits of wealth via 3 different paths (one being RE that has done far better than 7 digits).