Abbey Park is owned by the Council and is designated for Sports and Recreational use. If the Buffs can agree a long term lease for a reasonable annual fee what would be the harm in upgrading the facilities?
Largs Thistle, through a benefactor, spent £500k on an artificial surface on a Council owned property.
I don't believe that the residents of North Ayrshire would be happy at selling an asset that earns an annual income for £1. Nor do I believe NAC would be daft enough to agree to this. Even if they did agree to sell for £1 the Land is still designated for sports and recreational use which considerably reduces the value of the Land if it were to be used as a guarantee. Potential funders would also look at how any Loan could be re-paid in conjunction with normal operating costs.
The best option in my opinion is to determine how much it would cost to build dressing rooms and a Social Club on permanent foundations and then ask supporters for donations of £50 or £100 and arrange fundraisers specifically for upgrading facilities. 400 supporters @ £100 = £40,000.