What are the "27" areas of real estate investing?

[Belinda Lopez]

Okay, I was at a presentation a few weeks ago and the speaker stated there were 27 different niches in real estate investing. I emailed him but he didn't reply when I asked him what the 27 areas are and it's driving me nuts!

I came up with 23 on my own but just wondering if others agree or can fill in the blanks on other areas. I'm trying to put together a class on niche investing and want to make sure I'm covering or at least mentioning every niche I can. Here's what I have so far:

1. Wholesaling
2. Wholetailing
3. Fix and Flip/Rehabbing
4. Multifamily
5. Vacation Homes/Rentals
6. RV Parks
7. Rentals
8. Mobile Home Parks
9. Mobile Homes
10. Self-Storage
11. Land
12. Mineral Rights
13. Short Sales
14. Pre-Foreclosures
15. Foreclosures
16. Probate
17. Tax Deeds
18. REITs
19. Construction/Development
20. Owner Financing
21. Notes
22. Lease Options
23. Master Leases