Like Taylor said, if you're speaking with particular syndicators and considering investing, just ask about minimums, it's a common question.

Good PM companies will be able to speak in detail about their processes. 

You will want to be sure to speak with your licensed tax advisor (which your IRA custodian is not) and educate yourself on the concept before you move forward.

*Note: After speaking with a LV real estate agent, I have ruled out house-hacking a duplex/triplex/fourplex due to the location of available inventory (one of my short term goals is to live in a decent area/home)2) Would it be best to use a conventional 30 year mortgage to purchase the initial SFH and then refinance with that lender, or would I be better off looking for a hard money lender initially and then refinancing with a 30 year mortgage after the rehab? 

Generally speaking you never should sell unless you will 1031 Exchange it for a larger multifamily in the midwest or the South for cashflow.

Speak with local lenders and let them know your situation would be my advice.

I attended a panel with an appraiser speaking on this subject a few weeks ago.

Generally speaking states have laws about how SD disputes are to be handled.

If you just hire the cheapest or first PMC you speak with and it turns into a bad experience, please don’t assume ALL PMC’s are bad and start trashing PMC’s in general.

Of course, you need to speak to a lender first to see how your income and debts look and what you actually qualify for.