I bougth a small electric wheelchair from betterlife from Lloyds Pharmacy, it cost me 500.00. I rarely use it now. It was supposed to be less heavy but to be honest its still heavy to put in back of car.
They are selling a Refurbished Drive Cobalt Electric Powerchair for about that price which is all you need. I ended up buying a normal wheelchair off Ebay from Angel i think they are called it was only 50.00 delivered and is fab, very light weight. Its self propel, but i never use it in the house, its used now outside when my PA comes and we go shopping, and my husband and family can use it when i got out as well. I still walk in the house i walk by holding onto my grab rails. I know its essential for me to keep on my legs as much as I can.
Get your GP to refer you to your OT. They will sort you out with a wheelchair and will put aids in your house for you. Yes you can also hire wheelchairs if you google hire wheelchairs in your area I expect there is a company that does them.