To make this choice, shoes are irrelevant, childminder fees -irrelevant, White Lightening and fags -irrelevant. Even your previous pregnancies, the father and your lack of support don't matter at this stage.
All that matters now is simple do you want to be somebody's mum?
All the rest of it, the support, the childminders, the shoes or whatever things hold importance in your life can be worked on when the time comes.
Reading your posts, OP, I hope you don't mind me saying, you sound terrified. (Again, sorry if I'm reading you wrongly.) You sound terrified not about the practicalities of motherhood but of the emotional fall out, that you will or you won't love this baby. Is this fear justified, based on fact or your previous experiences or is it just fear of the unknown? Is there something you can do that will help with this fear? (I guess that's why some people have suggested counselling.) Remember, nobody has ever known how they would feel about their child when they are pregnant and no two pregnancies, births or babies are the same. In the end we all have to go with gut feeling. So that's what I suggest you do. Go with your deep gut feeling about being a mum.
PS I use the term 'mum' to mean primary carer who is bringing up a child. Hope that's OK. Of course as a birth mother you are a mother in some important but different ways from the way you are considering with this baby.
Good luck whatever you decide. 