It's common practice in Europe, Canada, Australia but almost unheard of here in the US.

You will get people willing to share in high demand areas and you will see this in high rent areas but you are keeping up the common areas and it is a bit harder.

If they are on the deed, the property is owned as 'tenants in common'.Is there a tenants in common agreement?

I have one property in an area going down hill and this is common. 

So when I hear other investors talking about how adding ADU's adds equity, you're telling me this isn't really a common experience?

The first apartments I rented as the owner, were previously rented by the former owner at $150 month including utilities. 

Seller is understandably getting really upset, because what the bank is asking for could take weeks and we were already supposed to have closed.Any adviceAloha Leah, this is very common as the other lender stated above.

STR management is 20-25% (I would recommend self managing or getting a VA), since income is higher you could probably get away with 5% for maintenance / cap ex but remember you need to cover utilities and cleaning for these units which drives up costs.

The down side is that STRs are more work, need to furnish it, pay for utilities and WiFI but in the right market (vacationers and business travelers) it could work. - If I were looking at cash flow as a really important important metric, I'd consider starting a business.

This is common for that build time frame.