Dear Hotel Developer,
I'll be writing a python script utilizing the github repo you suggested and parsing the output and overlaying that output onto google maps, before finally delivering the imagery in a HTML format.
This python script will be uploaded onto a adequately spec'ed Google cloud Centos virtual machine (VM) that costs about $5 monthly. I chose a lower spec'ed VM due to this being just a web request wrapper and doesn't require much memory or processing capability.
Alternatively, if you are already running an existing VM on google cloud, I could deploy the script on that instead to save you guys some cash.
I have no practical experience with MongoDB, but I've worked with MySQL and PostgreSQL and am fairly confident in being able to interface with them.
I will likely be able to finish this in about 5 days as I'm working on this after my full time job.
Looking forward to working with you!
Regards,
Lee Zhi Yong