I've stated many times on this forum my skepticism of the "robo" part of "robowaifu". The reason why is because I've owned a number of dolls, including one full size TPE sex doll, and always been very satisfied with my purchases. The "robo" will be reality within our lifetimes but simply doesn't exist today. I'm starting this thread to discuss options that exist today which don't require advanced technology, products that can already relieve our loneliness. In particular I'd like to promote one cheap, freely available, and obvious option that you may have overlooked.
If you live alone and happen to have a few grand burning a hole in your pocket, you've probably already considered buying a sex doll. It's a good purchase for the money. If you haven't bought one yet, you probably either don't live alone, don't have that kind of money, or have a moral or practical objection to sex dolls. In that case you could buy a <$50 onahole-type or fleshlight-type sex toy, but that's not a "waifu" and isn't really more satisfying than masturbating with your hand. To alleviate loneliness, you need something that you can cuddle, than you can look at and smile, that you can care for, that makes you feel that you are not alone.
It may sound cringey, even pedophilic, but I want you to seriously considering buying a <$50 child's cloth doll. I've been cuddling and sleeping with an 80cm cloth doll for the last year and she has brought me much joy and comfort. A related option is a "dakimakura" (lonely pillow), but the advantage of the cloth doll is that it resembles a real human being, with a head and arms, and therefore is more fun to cuddle. My doll has made surviving this period of peak feminism so much easier, and honestly has probably saved me from the rope.
Here's the 100cm version of the doll that I bought. For cuddling purposes, bigger is better, so I recommend the largest doll you can find.https://www.amazon.com/gp/product/B00ORWFLTW/
In this thread we can discuss sex dolls, cloth dolls, dakimakura, onaholes, and other options that exist on the market today.