Where do they get the money?

While writing this I am enjoying a cuppa and the telly is on. The programme on BBC2 is Escape to the Country which I enjoy and most days catch some of it while doing other things. However, tonight's couple are probably in their mid-thirties, quite ordinary and have five children but they have £425,000 budget. Last night's couple had £1 million to spend and usually the people that take part have very substantial sums of money in their budget. Where the hell do they get all this dosh when most of them seemingly have quite bog standard jobs which probably have bog standard salaries to go with them. Most of them certainly don't appear to be descended from the 'loaded gentry' class.
On a few occasions I have also watched other property programmes but it seems that to qualify for appearing on these, you have to be fairly loaded. Some of them make me quite angry, especially those where people go to auctions and buy decrepit flats and houses and renovate them on modest budgets, then flog them for large profits or rent them out as part of their 'portfolio'.
The grotty old cottage that I have rented for the last twenty five years (because I have never earned enough to save a deposit or enough to afford a mortgage) does not have all mod cons. There is only double glazing at the front of the house and because it was built before cavity walls and the add-on kitchen is single brick thickness, the back room windows are always running in condensation. I don't have central heating because there is no gas in the house, but I do have storage heaters which are bloody useless and do not do anything for energy conservation. The problem is, they are too hot in the morning and by mid-afternoon they are cold so in the evening another form of heating is needed. I have mould and damp patches on the walls in every room despite having the heaters on (no wonder I've got arthritis). I have had problems since the day I moved in but could not afford to move and the landlady has not carried out repairs or maintenance when requested, even when the plaster has been so wet it's fallen off the walls leaving bare brick. In order to get remedial work done I have had to resort to the Environmental Health department at the local council. They have issued repair notices which they have then had to enforce. Eventually she gets the work done but she has no conscience about taking a huge amount of rent from me for her 'portfolio'.
I think I have probably bought this place twice at today's prices since I moved in, I know there was no mortgage on it back in 1985 and yet the rent still keeps going up.
Then there are the twenty and thirtysomething commuters that drive around here in the mornings to park their very posh, expensive cars while they go to work in the city centre or nearby offices. They can't earn huge salaries yet they've got the latest phones and sat.navs etc. and there are even some that rent the very expensive Barratt hutch apartments and flats that have recently been built opposite our humble homes.
I must have missed something somewhere. Has there been someone handing out huge amounts of cash that I've missed? Or are they all lottery winners?