To me, it seems like a good idea but I just don't have enough experience to spell out why its logical. 

I can provide all of that with skin in the gameare you activily looking for partners and or PPM type syndications  where you manage them.. at your level seems like the logical next step.. sure would rather go with someone of your ilk than someone who just took a Brad Sumrok study course and is going to be their very first syndication or partnership..

The most logical explanation refusing to play ball by any rules but the cartel’s.

It isn't fair, it isn't logical but it is human nature.

You can find this information from places like Costar or core logic.

This would be items like mortgage interest, real estate taxes, home owners insurance, utilities etc.Pro-rating the expenses have to be done in some logical methodology.If the units are of equal size - they should likely be 50% allocated to the personal residence and 50% to the rental property.if they are not equal - you can pro-rate based on amount of rooms or square footage.

Sound logic. 

It doesn't make any logical sense to me, but maybe I would appeal to a different buyer profile that almost prefers to buy the most expensive mansion on the street that they can find? 

This works, the logic behind it is obviously escaping you, that happens, and the market works fine. 

In rare cases where a tenant needs that, they would bear the cost.It still may be the case that that MF carries less risk than office buildings, but a building with a large number of small executive office units would logically be less risky than traditional office space.Also, I initially presented an oversimplified scenario just to compare the different property types.