I agree with @PippaScope that it would be wise to use the grant search facility on the Scope website to seek charitable funders that you could apply to for grants towards the cost of your daughter's sensory and outdoor play equipment.
Here are some additional links that may be of interest:
The Family Fund
Variety Children's Charity
The Act Foundation
With regards to sensory equipment it might also be worth exploring if you are able to borrow equipment that would benefit your daughter:
Specialist sensory toys from specialist suppliers can be expensive. Some parents manage to save money by finding items that provide children with similar sensory experiences in high street stores, on-line or making things themselves. Here are some links to DIY sensory play ideas:
Hopefully your daughter already has contact with an Occupational Therapist (OT), who may be willing to advise on what equipment may be suitable and if necessary write a letter of support if you are applying to charitable funders. If your daughter isn't currently seeing an OT you could ask her Consultant, GP or SENCO about being referred.
Hope this helps
Jean Merrilees BSc MRCOT
You can read more of my posts at: https://community.scope.org.uk/categories/ask-an-occupational-therapist