You don't have to be double doing the work and you don't want to cause strain on the relationship through this.

At 26 years old I had torn both my rotator cuffs, started getting nerve damage in my hips and my doctor told me that if I don't walk away I will need back surgery...

Servers cost money and bandwidth adds up, so any effort to reduce the strain on those two components reduces costs and improves the site.

In fact, let me preface with a quick list of pro's and cons for a multi-family as compared to a single family.Pros:Proportionally lower taxes/insuranceEase of management(locationwise)Lower roof capital expendituresHigher rent to price ratioRarely fully vacant - can reno-rotate tooLow price volatilityCons:May pay minimum management fees due to lower unit rentsGreater potential for delinquency/damage(Much) higher HVAC capital expendituresLow price appreciationOverall, it's a somewhat bizarre phenomenon to me to watch the money rushing into multis. 

If you need it off, maybe one of those rotating floor machines with a scrub pad on it once the tiles are up.

That Or you can have your mail groups on rotation.

I work a rotating shift of two weeks on and two weeks off 12-16 hours a day.

For example, is the seller willing to do a land contract at terms that would make the deal less of a personal strain, at least for a few years?

Something like this would certainly put a strain on my business even with my reserves.  

I have a daily task goal that rotates as I never know how my day can change.