I just think that part is kinda interesting.  

If you have a third-party property manager whose management contract includes handling reconciliations, then they would be responsible for that.

What she needs to do is find an IRA custodian, aka, a Third-Party administrator (TPA).

I'm a little late to the party but wanted to jump in.

The virtual tours will be scheduled walk-throughs of properties for prospective buyers or real estate agents, not repeating video loops.A lot of Realtors already used video tours they promoted through Facebook, and simply turned to them more as people worried more about showing up in person.But the spread of coronavirus has pushed people to rethink other parts of the real estate landscape, too.OpenDoor, a San Francisco-based company that had bought and resold hundreds of Duval County houses in the past year, said online this month it was suspending making cash offers, but added it was working with third-party buyers who might still make offers.As concern grew about the coronavirus’s impact on communities and the economy, Realtors circulated an addendum to sales contracts allowing extra time to go to closing if either side has been in some type of quarantine.Either side could also drop the sales agreement if the buyer couldn’t get financing because of income last from the pandemic, another part of the addendum said.The changes, which both sides would have to agree to, were meant to give leeway people need to keep making deals in uncertain times, said Melanie Green, communications director for the Northeast Florida Association of Realtors.Despite the uncertainty, people have been buying.

., owners of the entity can manage the property, use a power of attorney to appoint a third party to execute on entity's behalf, etc.. 

Unfortunately MD passed within the past 10 years a statutory scheme requiring third parties to accept what appears to be a validly executed, notarized and witnessed instrument... so if they insist we must accept.

Regarding the seller wanting to stay on for a year lease after closing I'd ask for one year of payments to be escrowed from the seller's proceeds with a 3rd party.

During this process we spec all finishes/fixtures/scope of work, and then provide a final "guaranteed" budget that will only change if hidden conditions arise (code/safety-related), scope of work changes (additional work added above the defined scope), or fixtures/finishes change (price will go up or down, based on the new selection and any re-work necessary).I strongly recommend you find someone with a similar process, who also freely offers up proof of licensing, insurance, 3-party reviews, and client references you can contact.Finally, if it's a long term play and you don't mind spending the money, consider the "phased" approach mentioned by @Nabil Suleiman.

It's a duplex so you'll have 2 parties paying $2-$2.5 each, I'm assuming.