A majority of my business is repairing or replacing ponds built by pool companies, gardeners, do it yourselfers and even landscape companies. Great for me bad for the homeowner. There is ALOT more to building a pond than watching a video and reading a magazine or book. A 8'x11' pond is a good sized pond and alot can wrong if you do not know what you are doing. There is a ton of questions you need to ask the client and yourself before you say you can build a pond. I would suggest subbing it out to a local pond company or an experience LS company.
If you do, do it yourself do yourself a favor and stay away from Aquascape products.