It's a built to suit and the developer has this tenant locked in.

If you can show the IRS that you bought it and some circumstance required you to sell it without it having been the plan all along, a year or 2 may suffice, but under the scenario you put forth, it's probably not a good idea.

Before you get to comfortable, make sure there is a good demand in that area for that development. 

My goals Be a trillionaire (not the first Jeff has that spot on lock)Develop and help as many impoverished villages overseas as I can Help end the homeless problem in America Build a whole city The ability to travel to anywhere at anytimeGive my children everything they deserve Have the amount of money to help anyone in needThese goals might sound ridiculous and stupid to you but I know I will achieve them and then they won't sound so dumb anymore. 

Long story short, I'm considering a career change that can use my current skills and also help me learn more about REI and/or RE development. 

I have an excel spreadsheet that my business partner and I have developed over the past few years. 

It's a 500M development

Paragraph 6 of the standard deed of trust has an out for unforeseen circumstances, but talking/thinking/writing/etc about it months ahead of time makes it pretty clear that "unforeseen" does not describe this scenario.

The thing to remember is developing sources is a long term thing, its not something you just do once and then check the box. 

Only somebody with boots on the ground can provide that info, not Google or other access.If you wanted a cheat to just see ballpark cost, look at regional new developments that sold with similar attributes you desire.