Its like an alibaba of real state in which interested buyers and Legit Sellers/Service Providers meet in just one app! Hopefully no legal problems will arise during and after the finished product. But I'm also expecting the platform would have same tutorial on your first use.
It will help people if they release a demo version of their platform so that people will be familiarize with the application. And with your questions about the legalities or problem that might incur before and after the transaction, I read in their white paper regarding:
P2P – transparency and cost saving
MUXE is a P2P platform that allows the buyer and seller to communicate or transact directly with each other on our VPN. With these direct access for all parties, fees and other surcharges will be eliminated and leads to cost savings and discounts.
Smart Move
All MUXE transactions will be executed with smart contracts. This will allow all transactions to be executed systematically, transparent and efficient manner.