@Kin Lay To transfer your share of the house to your brother, you can use a quitclaim or grant deed, but there are tax implications.

What I've seen is that when asked to provide an assurance that a loan wouldn't be called because of a due on sale clause being triggered, the lender customer service typically just outright says it's not allowed, or default to a "no", because they see it as a black and white question, and miss why the due on sale clause is actually written into the mortgage document to begin with.If one is transferring property title from personal name, a Grant/Warranty Deed would be drafted/recorded to transfer title.

If my target would be low income residents, are there any grants, tax credits, or funds available to help me with the conversion? 

Talk to @Grant Shipman about a possible different way of marketing them to the subgroup who gets it.

LLCs are a legal tool, not a tax one.Transfer from personal name to LLC/Due On Sale ClauseIf one is transferring property title from personal name, a Grant/Warranty Deed would be drafted/recorded to transfer title.

.), I'd recommend that the residential units fully cash flow the loan as my experience is that mixed use properties are tougher to finance as most lenders tend to prefer one or the other and something in the middle gets more difficult.For example, and granted I don't know anything about the area/neighborhood, I would expect this property (https://www.realtor.com/realestateandhomes-detail/111-NW-Har...) to be easier to finance than the mixed-use property you mentioned. 

Although certain defenses do exist including, insofar as is relevant here, unreasonable hardship, " 'the court's discretion to grant or deny specific performance of a contract for the sale of realty is not unlimited; unless the court finds that granting a decree of specific performance would be a drastic or harsh remedy, or work injustice, the court must direct specific performance' " (id., quoting 91 NY Jur 2d, Real Property Sales and Exchanges § 204).

Curious how this will play out in the courts (granted it's LTR) and affect pricing products used for STR such as PriceLabs (which I use but have to seriously manually adjust for very specific reasons).

There are even ADU grants being offered.

Granted once I rent out the unit I leave, after vacancy and everything we would cash flow almost 400(minus heloc as well)All the deals I find.