I can't even make my bills each month and have to seriously consider unloading this. 

It shows that sellers have no idea what their prices should be.https://www.zillow.com/homedet...https://www.zillow.com/homedet...https://www.zillow.com/homedet...It almost feels like these sellers have already flipped their properties within the year and now they want to unload their properties before a recession.  

Lumber came WAAAY down and my prices are at all time highs so my profit on the 7 pre sales will be record profits ..

However, I believe you are on tract with Metro-LAX, personally I believe wherever they have those landing sites where LAX users unload passengers, it is a good area, and there are 8 of them.

With how expensive trade jobs are charging right now and the cost of lumber, the cost to renovate has about doubled in the last 5 years. 

Would you recommend building an ADU right now to others, given the increased building costs (due to post-COVID lumber prices, etc.?)

Among the headwinds, are escalating lumber costs, a lack of affordable lots to build on and regulations that drive up the cost of construction.

Record-high lumber prices add as much as $30K to the cost of building a houseWindsor desperately needs new, affordable housing, which is quickly becoming an oxymoron.

Before lumber soared last year, the roof quote including the detached garage was $7500.

The ARV on the house would normally be around $150k, but she said I'd be lucky to get $95k for it, and $60k-$70k would be more realistic if I were to just unload it.