For example, in the left-hand column on this page, under "Financial, Tax and Legal" are forum topics which often overlap such as "Tax, SDIRAs and & Cost Segregation", "Goals, Business Plans and Entities" and "Personal Finance" could all be relevant to someone's question, but there's (currently) no way to engage the denizens of all those forums without posting in all of them (what you want to call "spamming").My $0.02 ...

Spoke to a local real estate agent and some others and so far everyone says that it would be a huge headache (legalities etc) and would cost a ton up front. 

The one difference with Josh in this area is teaching you how to self direct IRA's and what to have in place so you can do it legally.

If not, any legal considerations for running a SFH as a duplex?

Do not rely on it for legal advice.

I'm just starting out investing in RE but I want to make sure I'm doing all I need to do properly and legally.

This was my concern as well regarding the legal issue and it being the same person. 

By buying the company, you can avoid certain costs like mortgage reapplication fees, title insurance renewals, and some legal fees.

From a legal perspective, how can you list it on the MLS?

@Henry Clark I'm not interested.NotNot just time to hit returns, I also mean time invested in the day to day on the way to $50k net of expenses, debt service, capex, legal/accounting etc.