You can do crowd funding with $100. I do not do it. I have never invested in crowd funding.
It may be great, but it is by definition very high risk. You can get a REIT on the stock exchange by buying 'O', or an ETF that concentrates in that.
RE is a great game, but you need to have some cash for the best deals. Or be really creative to the point of almost being illegal and/or unethical.
FIRE no later than 7/5/2016
at 56 (done), securing '16 401K match (done), getting '15 401K match (done), LTI Bonus (done), Perf bonus (done), maxing out 401K (done), picking up 1,000 hours to get another year of pension (done), July 1st benefits (vacation day, healthcare) (done), July 4th holiday. 0 days left. (done) OFFICIALLY RETIRED 7/5/2016!!