The fact is that these laws exist in many places, including Salt Lake City, Utah; Logan, Utah; Hartford, Connecticut; and Newark, New Jersey.

What asphalt integrity is like.

This is one area where it helps tremendously to have per-existing relationships with people in the industry such as family or friends.

Plus, very important to understand the new layout and how the dig down will effect the existing stairs, plumbing, etc.Happy to connect and talk through your specific situation because @Bruce Woodruff mentioned every project is different and know one price fits all espeically with these complex jobs.Where at in Chicago is your building?

If you can't find existing meetups, create your own by organizing casual gatherings for like-minded investors.

Unlike refinancing, which involves taking out a new loan, recasting keeps your existing loan terms—including your interest rate and loan duration—intact.

If you have a credit card with a high limit or a line of credit on the existing duplex that might give you some wiggle room.

Sadly, it seems that cash flow on long term rentals with 20% down just does not exist in most desirable locations.

What is the best way to best way to deal with the existing tenants? 

The two existing LTR units (on my family’s property) were built 5–8 years ago at a cost of about $80,000 per unit, so I’m estimating a 20% increase in costs for the new builds.My plan is to use the equity in the land as the down payment for the construction loan, which I expect will make closing costs the primary upfront expense.