@LakieLady sorry about your DP.
I'm really conflicted about it. If anyone can come up with a more eithical way of giving myself an income and leaving an inheritance for DGD, I'd be glad to hear it.
Honestly for me the main problem I see isn't the ethical side, it's the diversification (or lack of).
Handing a property over to the council / HA to use as social stock isn't a bad idea, and probably the most ethical way to do it, but I know a couple of people who tried this (1 neg equity, the other inherited) and both properties were declined. So you run the risk of buying somewhere only to find they don't want it.
Which leaves you being the landlord.
If you believe the previous poster you'll be lucky to break even. I don't personally believe this is the case in all situations, but even still...
You would have one income source, and best case scenario is that income source would fluctuate month to month (because you needed to call out an emergency plumber). Worse case is it dries up completely because people stop paying and you can't easily evict them, or they leave you with massive costs for repairs / redecorating.
You can obviously get insurance to limit your liability, but again that is taking away from the income you need to live off.
What I would do is downsize as soon as possible, preferably while you are still working, and put that money to work for you right now. Then research what else you could do right now in the most tax efficient way possible i.e if you have a workplace pension right now, are you making the most of matched contributions? ISA?
Diverse portfolio should be your number one priority, imo, incorporating both safer, lower yield investments and some riskier, higher yield investments. But speak to a IFA, or if that's not possible try making a post on somewhere like MSE or reddit's UKPersonalFinance with your figures and the shortfall you need to bridge to retire.
Also look at what you actually need as a monthly income when you retire, and if you downsize. And if there is any possibility of reducing those costs i.e renting out a room, perhaps to someone in the same position as you. Or increasing your income for the first 5/10 years... can you proofread, do transcription, for example? Retirement from the stresses of the day job rather than full retirement.
Does DGD have a junior ISA? This is another thing often underestimated, the effects of compounding interest and not having to pay tax on capital or dividends.
Basically what I'm saying is, just throwing it into property can often seem like the best / easiest choice but you have to look at the risks involved and compare it with what else you could be doing. What yield would the property give you after expenses and tax? What yield would just throwing it into stock market give you?