If all things being equal which business (when starting out) is more sustainable, easier to build momentum, possible to build up to a $1M GCI or revenue in the next 5 years, more profit margin?

Hoping" the market will appreciate in value or "hoping" to buy at the right time is not a sustainable way to invest in real estate in my opinion.Good deals are always out there no matter what the market is doing.Look at the numbers in the deal and if they make sense and suit your end strategy than you know its a good investment.Thanks and have a great day.

My ultimate goal is to have a portfolio of multifamily properties that sustain my lifestyle.

Is the influx a blip or is in long-term and sustainable?

When he said that it changed my entire mindset and although I don't have anything under contract or in a portfolio, I look at larger properties which have the cash flow to sustain operations and potential for longer term passive income. 

The balance of landlord rights and responsibilities are sustainable there.  

I'm educated as a civil engineer (Ga Tech) and have worked in the commercial construction industry for years in multiple roles; development, feasibility studies, governmental approvals and permitting, pre-construction and estimating, project management and superintendent work as well as handling all sustainable construction and LEED certification in house.I'm a voracious reader and am currently consuming "Building Wealth One House at a Time" by John Schaub.

The details of most of the niches elude me, however, I know they exist and how to find the answers now.I have been a marketing director and consultant for 10+ years in the hydroponics, organic farming, permaculture & sustainable industries.  

My goal for real estate investing to to build a solid foundation so that I can build a sustainable legacy for my children to take over when I am long gone, (which hopefully will be a long time from now).

After that it gets very tough to sustain without burning out fast.Really need about 70 doors or more for scale to get passive.You can use a manager at the lower unit levels but generally do not have enough gross income to pay for a full time repair person onsite.