Simply move move your property portfolio to areas where rents are currently very low then along with your parasite mates begin to drive the market up to the levels of the cap.
£400 quid a week for a shitty terrace in the arse end of Middleborough – lovely jubbly.
(alternatively simply register with the Local Authority as a provider of temporary accommodation for families. This means when the families get kicked out of the overpriced flat you are provided you cam simply get them to register with the council as homeless* and rent them a shithole for the same cash.)
* Local Authorities have a statutory duty to house families who are homeless or threatened with homelessness. The rent for these properties is covered by Housing Benefit, not Local Housing Allowance and as such is not subject to any caps at all. Most of the handful families in 2 grand a week mansions are being housed temporarily whilst the Council tries to find them a permanent property. They will still be there after the caps are brought it.