Real Estate Arbitrage Strategies - Missing any?

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As I understand Real Estate arbitrage - it is the strategy of purchasing an investment property with the aim of simultaneously or a short time later selling the property for a $ profit.

And that there are three common strategies:

1) wholesaling

2) flip

3) master lease agreement with a landlord

Are there others I am missing? Just curious if they fall into these 3 buckets or if there are other creative strategies out there.

Also, any investor out here in BP land tried all three? Curious if you can provide your thoughts on time invested vs realized profits for all 3 methods.