My agent said that he would help (which he never did), my brother (who was a partner at the time) said what harm can this old man do?

Account Closed: There is no harm in investing from an Inherited IRA by private lending.. assuming you are the one educating the lender, then you do have to be aware that the lenders IRA is an inherited IRA and could be subject to RMD, so make sure to pay the interest on time so that come time to make the required minimum distributions there is adequate cash on hand for the account owner.

But If I don't meet the minimum, they would quietly remove me from the GP, so no harm is done.Can this tactic work?

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

That might be over 4 months rent.5) When it's all said and done and he the company has been evicted ... it doesn't even harm him because it doesn't show up as an eviction under his name.6) He convinces he next landlord to put the lease in his business' name. 

Also, it will be good if I can get an idea of total out of pocket expense before SBA loan , not including down payment.Site surveys, soil testing, environmental studies, archaeological surveys, perk testing, wildlife studies, code variances, and I can keep going on and on and on. 

This red tape will scare off lazy opportunists that were not really harmed but if actual damage occurred, the PI attorney will track down all of your assets in the US.

We don’t know any PMCs to recommend in the area mentioned, but since selecting the wrong PMC is usually more harmful than selecting a bad tenant, you might want to read our series about “How to Screen a PMC Better than a Tenant”:https://www.biggerpockets.com/member-blogs/3094/91877-how-to-screen-a-pmc-better-than-a-tenant-part-1-services-and-processesWe recommend you get management contracts from several PMCs and compare the services they cover and, more importantly, what they each DO NOT cover.

I appreciate your comments as it is definitely an area that if you don't now what you are doing can pose more harm than good... 

I do not want harm to come to my tenant.