I haven't yet talked to any brokers here and am unsure how willing they'd be to accommodate a new part time agent. 

As landlords getting stiffed on the rent, it's real easy to get made or irritated but swallowing our pride and trying to be accommodating usually turns out to be more profitable.  

The 1031 is the tax advantaged way to "trade up" from several small properties into a larger property with the assistance of an accommodator.  

Any recommendations on firms that would be accommodating with such an arrangement--without burdensome monthly affiliation fees, required numbers of transactions, technology fees, phone answering? 

It will minimize a chance that you would lose money on this deal and/or ruin your friendship.Here is an incomplete list of what you will need, and most of that requires an attorney's help:write a strong operational agreement for your LLC, covering numerous what-ifstransfer the ownership to the LLC, either with a deed or with one of the alternative methodsconvert the responsibility for the loan from him to jointarrange that your insurance will accommodate the ownership changeestablish operating procedures, including resolving decision deadlocksset up a solid bookkeeping systemI cannot tell how experienced you guys are with flipping, but a warning is due: over 95% of first-time flips lose money.

Again, you avoided the question, if the landlord "wants" to sell should the tenant accommodate as well?

Renting their living accommodations helps them to maintain this fluidity.

The PHA also can assign FMRs by neighborhood (outside of the pilot program I mentioned), provide exceptions for tenants to rent places above FMR if they require reasonable accommodations, and is required to not spend more than market rent for a unit, even if the unit is under the FMR cap (ie don't pay top dollar for war-zone units).

@Shital Thakkar - being from that area I can tell you that new construction is being lined up to accommodate for the merging of SA, SM, NB, and ATX.

I would determine this first, then approach your Tenant with the information, hence either their family needs to find other accommodations because it is violating your lease, code etc, or if no restrictions you may want to proceed with your idea, however, an 9 person household may very well use more than $200 worth of water.