Hello! Love the site idea! It'd make things so much easier. Will you be offering any third party services such as payment reimbursement for cancellations or tax reporting for members who qualify? Would you also be doing any form of debt collection for commissioners who do not pay?
These are things that we would like to do, but are not really feasible right now. It would be great to do a bit more guaranteeing and be more involved in the payment processing, but that is a lot of responsibility and legalities that we are not quite able to manage right now.
Additionally, we do not have the capital to back payments. We are funding this project ourselves currently, and will likely be doing some sort of kickstarter-esque campaign once we have a more finished product.
However, we are hoping that a rating system will help to weed out unreliable commissioners (as well as artists). But that's about the best that we can offer for now. As far as helping with taxes, that is definitely a possibility if artists log all of their payments in our system, a downloadable spreadsheet/export of some kind is not unrealistic.