Hope your grandpa is doing well and is doing something towards the restoration of his old home. I think you should also create a website with your grandpa's story so that many people will be able to read it and promote it online. You can try out the hPage website builder at https://www.hpage.com so you can promote the crowdfunding better and to a much larger audience. Maybe you can write something about your grandpa's story, include more pictures, a timeline of what is being done to achieve that goal, news of how your grandpa is currently doing, etc. so that people will be updated about his condition and his house through a website.