I’d like to opportunistically invest  There has been no sell off in the DC market.

Potential or actual STR revenue has no bearing on what it's worth.

These special assessment were thousands of dollars, and there was no sufficient reserves from the monthly fees to cover these large biggers, so the owner were required to cover the shortfalls out of pocket, what a great way to ruin your cash flow and ROI.There are benifits to condos, including tennis courts, playground, swimming pools, club houses, and fitness facilities. 

A cost segregation study was performed on this single family home in Iowa City, Iowa with a depreciable cost basis of $649,900.

Plans for what you're building will be key - it's too vague and open right now for someone to advise you on potential cost. 

Perform a cost seg study on JUST the ADU.

Hi there,I'm trying to determine the best way to live in and eventually acquire a property as an inheritance while maximizing cost-effectiveness.

The tenants were more interested in that than turning on the already-installed alarm system because there was no monthly cost.

I wonder Trumps thoughts on the affect of Tariffs and the cost of materials.

I have not looked into this but, if process ramps up, could cut construction costs, time to market and massively increase supply, too.