Having a real estate license and MLS access helps as there are private notes that only realtors can see that can sometimes explain seller motivation or contain other notes about the property or seller situation.

Also, look into Green Bonds or Green loans if you are adding EV charging or solar etc. as Banks like to access that source of money if you're modernizing a building to be Energy efficient or leed compliant.

I'd recommend finding a creative loan broker in your area who might have access to different loan products other than traditional stuff.

Is it an access easement or a parking easement, or both?

Do you have a link where i can access these?

Lastly, there will be times where you will be able to pull a HELOC on your home if you see appreciation which can provide opportunities for you to get more access to capital to invest. 

Are these dampers accessible externally to adjust or it requires opening up the ceiling?

HELOC is for accessing temporary capital.

I need access to the MLS.

Tools like Zillow are getting pretty good at estimating market rents and rental listings are broadly available to see what others are asking in the area, but actual closed lease rates are the best indicator and agents with access to the MLS is the best tool I'm aware of for that