@Yashar E. have you looked into getting a mechanics lien on the property?

From fully automated Kiosks (an ATM looking thing that rents the unit, sets up auto billing on tenants bank or credit card, dispenses a lock if the new tenant wants to buy one etc), to smart phone Apps that do the same thing (except vend a lock) to 24 hour USA based call centers that will manage the business and rent the units for those customers who want a human to talk to (and the Kiosk software, smarphone App software, and call center sofware can all be seemlessly integrated within your business management software.

Have a realtor set you up on an auto email with your criteria. 

I like to say what would happen to the auto industry if you could not finance that 60k SUV and it had to be bought for in cash ???? 

In my non-attorney way of thinking, if you participated in the construction/design and had your crew doing some work, it might be a stretch, but I'd consider a mechanic's lien.Is the 'IOU' they gave you in the proper form of a promissory note? 

The Port of Mobile signed a contract with an International Vehicle Shipping company out of Chile where the port will be used to send vehicles through the port into the states and will be used by Alabama auto manufacturers to ship vehicles out to international markets.

You will have to put up with being treated with all the mechanisms that the society excludes aberrant people: contempt, ridicule, disregard.The best thing that I can say about the second point is that once you do start making some money, it's amazing how quickly the same people that treated you like garbage start fawning over you.

When it comes to mechanical systems on a multi family.

Max - you can call Ertz Mechanical anytime they aren't available! 

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