It started out as a verbal agreement because time was a factor.

An important factor is chatting with an attorney to see exactly what your risk is, then proceeding forward with an accurate account of the costs/benefits of each pillar.

This is a great follow up read to my thread found here for anyone looking to get into this business:  http://beta.biggerpockets.com/forums/93/topics/583...One other factor I would want to add and include here is building a quality (not quantity) buyers list.

I have a full time factory job and VERY rarely take money out of my rental business.

I have my own print factory at home. 2 printers going, one printing envelopes, and one printing letters.

No WOW factor. 

Prefab container homes built in a factory need to be certified by state and reviewed by state representatives during construction (within the factory).

.: Like Blair said, be careful about the "fake factor".

I've got back to back ADU builds, and my only limiting factor is that the utility companies just can't keep up with the service requests to provide water, power, and gas to these new units.  

Another important factor is the hidden rental costs of the condo hotels, you will have hidden costs that the hotel operator charges you for renting it, implausible things (resort/application fees), which you cannot avoid because condo-tels declaration of condominiums are designed for the hotel operator to profit from owners even if they don't put the room in their hotel program.