These are huge wins.Also, get your finances in order and get pre-approved so you are ready, willing, and able to purchase which will allow a realtor to take you seriously.

Even go from multiple SFHs and consolidate into an industrial building.

These buildings typically have 3 floors with 2 units per floor.

Rather than wait to be asked just have the form ready and submit it with your lease.

As they create the debt after with your situation debt is already created so getting the banks blessing is paramount.I sold an office building i had to take back after the GFC my bank was good to me and kept my loan in place and I did what you did and sold to my Tenant..

Hi,I have a building which has a finished attic space on the "3rd" floor.

My plan was to build and sell the beach house or have it on AirBnB. 

With a co-op you don't own the unit, you own shares in the corp that owns the building and all the units with the shares having an exclusive right to use a particular unit. 

I wouldn't recommend a new build home for rental purposes.

The property should have extra tiles left over from the build, use those to replace any needed tiles.