The better location and economy of scale on the 4 plex is attractive.

But based on the information that I receive from Furnished Finder I have seen a few other reasons for medium term rentals, including temporary jobs, relocations until a permanent housing solution, traveling machinist and a manufacturing position.

There is of course the marketing component, lots of legal water to navigate, and if you scale your business finance will certainly allow you to create more creative ways to get deals done and manage larger projects with creative financial instruments. 

That sounds great if you can afford a carpet and paint flip or can afford a larger scale flip out of the gate. 

I do believe there is more headache with multifamily (more turnover = more headache) but I think the extra cashflow possible and economy of scale possible from one purchase (4 units from one loan vs. 1 unit with one loan) makes it totally worth it.

I appreciate how he has created such a solid model at a large scale but is not flashy or boastful.  

@Sunir Manandhar There is opportunity but I don't see it as a startup with potential to scale for the exact reason you reference: subletting.

It is the greatest wealth scaling tool available for investors.

It's a full time job and scaling to a hands off point will take quite a bit of work.

Unless and until you scale up to hire others to do the grunt work for you, you're it.