Dentistry treatment

When I was younger I had bulimia. This effected me for 10+ years. Due to the acid I brought up, I have gum desease. Most of the roots of my teeth are In need of treatment. I also now have an abscess that keeps re occuring . I've had antibiotic doses and it isn't going. 
I desperately would like to try and save my mouth but due to the stage it's at, no insurance will accept me and I can't get an NHS dentist as no one is accepting new patients. (Due to covid)
My only option is private clinic and this is alot pricier. I need root canal on 3 teeth, I need my gums cutting due to how deep the desease has spread and then roots deep cleaned. I have one tooth that needs extracting. 
The total price to this is about  20,000 for the full shebang. (Extractions, root canal, implants etc- - please see the price list)

 I haven't smiled in years due to the embarrassment. I don't have any family as I'm a lesbian and they are strict Christians and refuse to speak to me. I don't know what else to do and would really appreciate any help. 

I also have Asperger's (currently working with Drury lane mental health team In Wakefield) so I don't have many friends to ask for help with this as People think I'm weird and too 'blunt' so I don't know many people.

Raising this money will mean I can actually smile. It's been so long and I desperately need to sort this.
Any help will really be appreciated

I think I need to share a bit more of my situation... 

I was adopted (residency order) from the age of seven (ish) . My aunt took three of us under residency order. By the age of fifteen I -stupidly- moved in to a mans house that was 19 at the time. I ended up in a routine of getting into abusive relationships and have been in a women's refuge due to recieving abuse on more than one occasion. Most of the relationships were abusive in my younger years (I feel awkward saying this) and I ended up stuck in a cycle. This past five years I realised I was a lesbian . And then my family have stopped having contact because of this. 

My aunty (who raised me) died of cancer in 2018. 

I have found my real parents but they have mental health issues and don't want to reconnect. 

I have therapy, I works with a mental health team. But due to the stupidity of my past experiences I now have my oral care to think of. (Bulimia, depression and confusion?)

I have a stable job (I'm a mental health worker) and have been bettering myself every day ..

But I literally spend all my income on rent, food and travel to work etc. 

Any help is much appreciated. 

Thankyou