Sarah and designer Max McMurdo and architect Damion Burrows travel to Wales to meet Carwyn and Megan, who plan to build their first home together out of two salvaged lorries on a miniscule budget of just £5000. Damion meets a Cotswolds couple who have cleverly played the property market to turn an initial investment of £33,000 into an award-winning, mortgage-free home worth over a million pounds. And a couple in Edinburgh aim to beat the bank by clearing their mortgage by building a block of flats as part of a collective.