Crowd funding online is a fast way to find inverters for cool projects and many big successful projects like form 1 3D printing. So starting a big investing market place with WordPress will be easy as it has lots of features and is user friendly, easy to install and with free Fundler you can create a premium look website without any cost.
Fundler is a free theme developed by Mandloys that is based on WordPress crowdfunding Astoundify plugin with an attractive design and cool trendy sliders for authors to start their project campaigns that could advertise and be featured easily to get a lot of backers.You can easily create a decent looking website website with fundler and editing little bit for your purpose will give a better look. Some awesome features that come with this theme are that it is fully responsive,you can run it on any browser and on any gadget. They have their own custom panel to customize themes for your needs and you could even get support from their forum. It includes all necessary plugins with contact form, social media integration and is fully compatible to the latest WordPress so check check themes from here.
I hope you want to use the theme that I suggested and if you want to check out some other best responsive themes , take a look here.