Contact the council, she may be able to get a grant towards/full cost of the fence.
Respect to you and friend for helping this lady out, nice to see people like this about still.
Just to lift her spirits a bit if she picks a trike from the ARGOS catalogue, I will happily pay for it for her, just pm me your addy/someones addy to send a cheque to, or I have paypal.
tabetha