Families will sacrifice a lot to get their kids a good education, and property values should be relative stable even in down times. 

I don’t get much time, but the down time I am allotted, I take full advantage of regardless of how tired I may be.

So the owner/seller would need to retain an attorney (LLCs can't represent in superior court) and that's where things bog down, time-wise.

So if it was me I would let them do it especially since it appears they are not averse to the disruption & the rehab can be done all at once rather than your idea of spacing it out with the possibility of downtime. 

The added costs of labor would be offset by less downtime.

They forward a copy on to the tenant so it reinforces the reality of being a responsible individual.There may be some downtime on background checks right now due to Covid19.

Your tenants seem to have a lot of downtime.

That's not true at all.Many deals fall out for whatever reason.Also the pending comp might have closed already and the listing broker didn't update the status yet in the MLS.I find this frequently and even though my local MLS can fine the broker/agents for not updating on time they are still lazy agents out there.A sold comp 6 months back means nothing.Finance markets have changed,money down,time to close,more regulations,your local market could have stayed flat,declined heavily,or has appreciated and gotten hot.So 6 months ago does nothing for me.Recent closings in 30 to 60 days max in close proximity and not far away will paint a better picture.You also need to look at what is common in buyer paid closing costs and the list price to selling price ratio and days on the market until a sale.Good Luck

I'd tell her she can go and you'll do your best to get the unit re-rented ASAP but she's responsible for the down-time on the unit.

You will lose 2 months rent at least in downtime plus repairs.