Creating Bitcoin Version Gumroad

I want to create Bitcoin version Gumroad. Gumroad [login to view URL] At present, Gumroad has many things, but first thing I want to realize is the initial Gumroad function URL. The same thing is MonoPay, trying to monco mono instead of Bitcoin. monapay I have already stopped the service, but the source code is open to Github. Monapay [login to view URL] * License is a 3-clause BSD license It does not matter if you convert mona to Bitcoin based on this source. Based on the above sources, it is Python 2.7 and Django 1.6, so you may need to adapt to the latest environment. The system itself is deployed in AWS. Contact Slack or Chatwork Source control project management is done at Github. The languages ​​displayed on the site are Japanese, English, and Chinese. Translation is paid here. I think that knowledge around Bitcoin is necessary. Please suggest the cost and period required for the preparation. Please answer the following questions when applying. Q1, Do you have implementation experience around Bitcoin? What is it? Q2, do you use Monapay source for implementation?