@BeQuaintLion
It feels like a huge undertaking, even more so if you're self employed.
I was a single parent, one wage coming in, drove myself mad worrying that I could lose my job, get ill, something huge might go wrong and I won't have the money to sort it.
I went for it and nothing really terrible happened, jobs needed doing, new boiler, had new windows and patio doors put in, new soffits and facias, had a damp patch fixed (not all at the same time) saved up for each bigish expense.
I certainly wasn't in the prime position you're in, you have a huge buffer if anything goes wrong plus you could always get a lodger if you found times got hard.
Tbh if you were renting you'd always find the rent money.
Try not to panic, get yourself a Pinterest board and start planning decor, doesn't have to be expensive, get excited.
Im a dab hand at DIY now, give it a go (thanks YouTube 😁).
Ive tiled a bathroom, layed a wooden floor, re-grouted some dodgy cement in the brickwork outside, made a step out of bricks and a paving slab, can hang wallpaper, paint, fixed a hole in the ceiling.
Go for it ❤️