There's a diffrence between a house that untidy/ a bit messy and one thats not hygeinic, one thats a home and one thats a souless showhouse
Took me years to figure that
I had a friend whose house was spotless, neutral up to date decor, no toys lying around. I did envy that
My house was always cluttered, full of the kids and their pals, never quite tidy
My clean friend would allow 1 toy at a time, one friend at a time, hover to get your cup as you finished drinking so's she could wash up, she'd never settle to have a blether as she'd be jumping up to tidy, get the wash away, make sure the kids didnt untidy anything
It wasn't relaxing to be there and now my daughter is older she's told me how although she liked her young friend it wasn't nice to visit, to be on edge the whole time about "making a mess"
So relax
deal with it a little at a time
As has been said those big blue Ikea bags are great
I still use one for putting the stuff to be ironed in
if you have a few spare pounds a solution for bay windows is to treat each window induvidually
use those expandible net rods like these cgi.ebay.co.uk/24%22-40%22-%2f-60CM---100CM-EXPANDING-NET-CURTAIN-ROD-BNIP-_W0QQitemZ260467124052QQcmdZViewItem?rvr_id=232273826373&clk_rvr_id=232271437123&imp_rvr_id=232271437123&clk_rvr_id=232271437123&cguid=effc433012f0a0a9f5838d23fff855f5 or wire, one lot to each window
get lightweight curtains such as these www.ikea.com/gb/en/catalog/products/60043596
you dont need to use the tab top, make a hole just under the tabs and poke the curtain rod through
cup hooks to hold the tie backs or use a bit string or ribbon
Another thing to do is limit the amount of toys
it can be overwhelming for the wee ones to have a lot of stuff
put some away for a few weeks either blue ikea bag or suitcase on top of wardrobe
if you see stuff they're bored of put it away and bring out a "new" toy
boxes are brilliant for chucking everything in for quick tidy up
either big colourful plastic one or even cardboard which you get the kids to help" decorate"
sheets and throws for furniture, whip one off and put in machine put another on to make setee or chair look fresh
It's hard when dealing with depression to deal with the house
but it may not be as bad as you think, you are associating negative things, like the smell of wee and you being ashamed as a child, with your present home,
bet your house doent smell of wee, bet its not so bad
as for decorating, difficult with little money and kids
do a wall at a time
clear it, clean it, ie wash it down ceiling to floor
now does it need a lick of paint?
if so do that wall, if not put pix, posters up
when you have time or a free evening do the next wall