In the building where I have a rental property, the special assessment will be implemented this year.

So in such cases, Lending is limited, but is very much Possible, for non-US citizens investing in US property,The LTV would be 65-70% lend and the Interest rates would start at 6.35%What is the address of your property, and I can give you a quick desktop assessment, perhaps the value could be over 50K as the Detroit market has risen quite strongly in the last 7-8 quarters, (since 2017)

Based on the comprehensive commercial appraisal we when the property was purchased, all but 2 of the comparable commercial properties had tenants paying utilities.

@Roderick Gunn, for local government liens (such as grass cutting, demolition, sewer assessment, fire dues and library dues are the most common) the local government lien trumps the tax sale.

Outside of my engineering degrees, my work in medical devices makes me appreciate the process of assessing risk and risk tolerance. 

I also called the tax assessment office. 

If the cost is not covered by insurance a HOA will generally levy a special assessment on condo owners.

Most developers will not consider a speculative deal without proforma of 20% yield.So to specifically answer your question, you need to determine the level of appetite of your investors to assess what rate of return they are seeking with respect to their perceived level of risk. 

Speculation on what may or may not happen in the next 20 years, whether you even live that long, is a entirely different animal.Condos are generally a poor investment vehicle due to unpredictable rises in condo fees and special assessment by the HOA.

We have more aligned our targeted returns with each investments risk assessment.7.