我也是担心这个事情，有利的地方，资金会涌入，回报自然降低

Anyway，这是这位老先生给我的email：
Generally speaking, Units are managed by a local management company

They secure the park location, (About $600/Mo), take care of units, do the rental.

For their services they pay all expenses and share the rental with owners (Owner is base a base fee, $650 and 28% of the rental amount) owner generally nets about $1300 to $1600.

The demand for housing is expected to be greater than 15 years. Units are expected to be servable for that length of time

Your item #5:     Turn over is expected as workers move to different jobs. But Occupancy rate is about 90%

Varies from Texas and North Dakota