For my portfolio at large, I budget for the 50% rule to be ultra conservative. 

It's mostly luxury or higher-end homes, townhomes, and condos that are in the works.

The prices vary widely from $900k+ mansions on the island to $300k ish homes not on the island, but on the Inter-Costal.

Can any Luxury agent (or someone that knows an agent) contact me?

Even more important is that unless you build a Real Estate Investment Business, you're going to struggle to build mansion in the hills, private plane wealth.

Now I know this is a very broad question and there is so many variables to give a honest answer, such as far as how they financed the project, what they are building, the size of the property and a ton of things more to consider.But for this post lets just use developers who build luxury spec homes. for instance we can use a big market like Los Angeles, how much do they developers really make who buy a single family house and develop a new luxury modern home and then put it on the market for Millions and millions.Seems like there is a ton of risk involved with it, and also seems like they rely heavy on financing with both debt and equity component.

This may be your chance to downsize permanently with only rent and no responsibilities or to use as a vacation home and live in and around the predominance of multi million dollar MANSIONS.

I come from the investment banking background and I've met many individuals who are considered high-to-ultra net worth, and many of them have the capability to buy multiple houses in NYC but few do.

I currently work at Audi Seattle selling and leasing the nicest luxury vehicles on the road today :-) My first real estate goal would be to purchase a multi family residence, live in it, rehab it, and use the cash flow to pay down the debt.My long-term real estate goal would be to build a portfolio that would allow me to retire from going to a 9-to-5 job.I came to join bigger pockets to connect with a community of like-minded people and to help contribute to the community where I can.Thanks for reading! 

It's being operated by a manager who uses corporate contracts in additional to AirBnB (see "Luxury Condo, World Congress Center") to keep the space occupied.