The definition of buyer in the class of HouseBuyerRecord is not correct.

[cz293]

The incorrect code:
public Household buyer; // Who wants to buy the house

This is not exact, as the so-called buyer could be either purchaser or renter
This class has been used in both sale and rental markets.

[adrian-carro]

In the future, names of record classes should be changed as:
HouseBuyerRecord ---> HouseBidderRecord
HouseSaleRecord ---> HouseOfferRecord

[adrian-carro]

Note that this affects also the non-spatial model!

[adrian-carro]

Also, remove BTLBuyerRecord and replace it by a boolean variable within HouseBuyerRecord and change RegionQualityRecord name to QualityBandRecord.

[adrian-carro]

Finally, RegionQualityRecord has been removed and replaced not by a record object (extending HousingMarketRecord), but rather by a simple container, RegionQualityPriceContainer.
All solved by commits 4dc9e8f and a1a5c19