There are disadvantages, like more expensive mortgage insurance, but there are also advantages, like putting less down even on a multifamily.

There are advantages and disadvantages of owning property in your own name.

The disadvantage would be that I would have property throughout the country which would make it harder to manage.

YES, you are at a significant disadvantage, and it's going to be monumentally difficult to do well, even with resources such as those that have been mentioned already.

This is called chasing and will put you at an extreme negotiation disadvantage.

As an OOS investor you will be in a disadvantage vs the locals.

Long term, yes it's more advantageous to have it in a corporation to save on tax, however, there are disadvantages as well including higher costs (accounting costs, lawyer fees, ease of finance, mortgage rates) and, it may not as "liquid".

Despite suggesting that my recommendation basically would take advantage of her, (by offering to rent the woman's house "with all rents over expenses going to her"), it is your more rigid recommendation to move on if she is unwilling to sell, which works out to the disadvantage of all involved and provides a solution to no one.  

That, however, is not the biggest disadvantage of the JADU.  

Any other disadvantages you can see to being setup this way from a tax standpoint?