Hi,
Firstly, do speak with the immigration ministry and immigration specialists etc who may know more about the application process. I'm thinking if there's a section which asks about any assets you own currently and if there's one about what you own already in the UK, or if there's anything where you can add information where you can specify that you are intending purchasing property/assets. If there's nothing of this kind, then I'd doubt there's any advantage to your Visa application.
I'd also say evaluate carefully to ensure help to buy is suitable for you and your circumstances etc. I'd personally never go with such schemes like this and shared ownership etc, but I know that with others, they can be useful.
Cheers, DtM! West London & Slough UK!