You might want to see where the water lines are coming from in your unit, make sure that you have sealed around that as well.In my condo association, they determine who is at fault for the treatment of the building by bringing in a third party inspector (pest control) and whoever the pest control determines to have the worst/biggest infestation of (thing) is generally at fault.

In my opinion, the biggest deterrent (which is often overlooked and rarely mentioned) to investing in Chicago is the legal system.

Down payments are usually the biggest hurdle as most lenders require 25% down on MFHS. 

The biggest challenge I'm facing is knowing what assumptions are reasonable. 

Secondary services they are doing some telehealth options by phone or video and then emergency type services so general revenue is down.

Given our situation, what are the biggest mistakes people like me make? 

If you use one of the more standard ADU plans then the biggest permit issue will be the DPP delay while they work through their backlog. 

Your biggest issue, @Alex Brewer, is that it's going to be very difficult to get any new development started at the moment.

If you were to look back on your investing career what have been the biggest mistakes you’ve made?

Yikes, well first off take a deep breath and be thankful they are out...they just solved your biggest potential problem.