9) adding multiple ADUs or adding an ADU to a quad looses F/F conventional financing.

@Richard Benjamin Wilhite, @Bill B.makes some good points about loan terms and the strict identification rules for a 1031 exchange.I would add from a tax mitigation perspective that buying the largest property possible will give you the greatest amount of cost segregation possibility and at the lowest cost since it would be one study rather than several. 

You can also partner up as well/have multiple people on the loan for down payment purposes!

If you are talking about investments of multiple 6+ figures that will be tied up for years then you may want to have your own. 

. - If you come across the same tax expert on multiple threads, and you consistently like their responses, send them a PM via Bigger Pockets or contact them via the contact information listed at the bottom of their comments.IMPORTANT: we're prohibited from offering our services to you, both publicly and privately - unless YOU initiate the conversation from your end.Still, some people choose to ignore these Bigger Pockets rules and will send you an unsolicited PM or even post publicly something like "give me a call, happy to chat."

I know in my 50 years of being an RE Broker in Multiple states I have had to just go direct its usually frowned upon per ethics but if you think you need to nothing stopping your agent from doing that..  

@Tyler KeslingSounds like you have the right perspective.  

You need to get some perspective buddy, unless you are trying to hide something.

Hope this perspective helps.  

With the exception of 1 bedroom units, you basically have 2 options:-Oversized/commercial machines (potentially multiple sets)-Off site cleaning with clean spares on siteThe latter is almost always the most efficient and basically what hotels do at scale.