The original post assumes "all other things being equal" with property managers, and that isn't the case.The cheapest shirts are at Dollar General, but that doesn't necessarily mean they are the best.When it comes to property management, it's not what you are paying, but what you are getting. 

Original asking price of 110,000, I purchased for 90,000.

There’s a lot of misinformation out there that is presented as knowledge.One can do a reverse exchange where one buys the new property first and then sells the original property after - all via a 1031 process. https://www.investopedia.com/terms/r/reverse-exchange.aspReverse exchanges do exist and they are “legal”. 

So many people try to convert a property they originally never considered as a pure investment property into an investment property.  

Regardless, I'm just trying to give them the right guidance since there is a lot of equity in the property. back to my original post.. 

The fund, not being amortized returns more in the years following plus also having preserved my original capital.

There will certainly be buyers interested in having an ADU but I'm not sure they will be able to pay for the cost the original owner incurred to get the ADU.

Maybe some alternatives, like buy a second one, move into that as your primary, then after a year or two 1031 the original one.   

Originally posted by @Gary Freidman:Anyone worked with Smartland in Ohio? 

Confirming they were originally asking 350 and you offered 430K?